What tool for repairing phones. Cell phone repair tools. advice for those who are planning to open a phone repair shop

Even a novice master will not be able to cope with solving the simplest problems if he does not have certain ones “at hand”. Especially if the specialist plans to restore electronic gadgets and communications equipment. Let’s say right away that cell phones cannot be restored “on the knee”; you will have to incur certain material costs to arrange the workplace. We will not engage in a list of ultra-modern devices; in the framework of the article, we will present only a set of the most necessary things for a professional.

Hand tools

Let's start with the most basic and simple - with classical instruments. In the list we present the main types that you really can’t do without:
1. You will need to purchase. Moreover, flat and cross-shaped options of several “running” sizes will be required. Don't forget to order torx screwdrivers. As for the size, it must comply with standards from T5 to T7. It’s also a good idea to purchase a kit with interchangeable nozzles. In this case, there will definitely be no problems with disassembling the case or other components of the device.
2. When collecting a set of repair tools, do not forget about such an important thing as a scalpel. It is with its help that you can very easily clean tracks and wires. Try not to skimp on the accessory—jags will appear on a budget item pretty quickly.
3. You will definitely need a pair of tweezers. Look for a standard sample and one curved one that will allow you to reach hard-to-reach elements.
4. An eraser pencil, made in the shape of a classic pencil, will definitely come in handy. With its help, it is easy to clean oxidized contact coatings. You will need a little time to tidy up your badly neglected contacts.
5. Don’t be surprised, but experts often use toothbrushes to deal with minor oxides when working with “recessed” smartphone models. Great efficiency can be achieved in combination with a special liquid, called a wash by service specialists.
6. The holder in which the board is firmly fixed greatly facilitates the work process. It is easier for a person to do delicate work when a small fragile element is fixed.

Power supplies

Quite often in service centers visitors bring broken gadgets in a completely discharged state. Be sure to have a charger available that can charge any battery. In this case, there will be no difficulties when testing the performance of the electronics.

Take care of your order. Often during testing there is an urgent need to power the phone from the power supply in order to track the corresponding operating parameters. This element is also very important if the smartphone battery is completely unusable or absent. Choose a product with the following parameters: output voltage within 0 - 15 Volts, current at least 1 Ampere. It is necessary to order samples equipped with indicators, because only in this case will it be possible to accurately record certain operating parameters. As professional workers at specialized centers advise, preference should be given to devices with dial indicators; they are much easier to read when testing.

Soldering equipment

You will have to spend significant amounts of money on a soldering device, additional tools from this series and related accessories. So, here is a small list of working tools from this series:
1. Be mentally prepared for the fact that the standard one will not save you. You will need to select a special soldering station. Only with its help can you achieve stunningly accurate results when it is necessary to solder chips or when it is necessary to replace filters. Modern hot-air models significantly facilitate the work of the master; thanks to the high degree of reliability, the service will provide long-term guarantees when performing complex tasks.
2. Experts advise buying BGA stencils; at the same time, you need to stock up on BGA paste. As practice shows, these are the elements that will be required when carrying out particularly delicate work. As for choosing a pasta brand, rely on your preferences. Some find it convenient to work with a thick paste; many masters prefer a more liquid modification.
3. As you can see, not only tools for repairing phones are needed, you should also consider purchasing dozens of “little things.” You will probably need a no-clean flux gel. The substance boils at a very high temperature, so it is indispensable when mounting chips in elements such as BGA packages. Why is the product called no-clean? The fact is that it is characterized by a complete lack of chemical activity after soldering is completed. Accordingly, there is no risk of further damage to components as a result of corrosion. In addition, additional protection against moisture is provided.
4. A convenient addition will be a special braid, which makes it much easier to remove solder. The process of removing excess is greatly simplified and takes less time.
5. Not as a main device, but as an auxiliary device, you will need a regular electric soldering iron with 40W characteristics. It is needed when working with large discrete components that have significant heat dissipation rates. This accessory is indispensable when preparing mounting points for charging connectors and other similar elements.

Magnifying devices

Another expensive purchase will be a microscope. Even a person with excellent eyesight cannot do without it. It is used to examine boards and other small parts. With its help, particularly delicate, critical work is performed that requires maximum visual strain. In addition, look for several magnifiers of different powers. They will be a great addition to a stationary device. Sometimes it is more convenient to examine a detail in your hands.

Measuring instruments

Identifying a complex breakdown using experience alone is not at all easy, and sometimes impossible. To achieve the goal, you will need special equipment for telephone repair, which is used to test the functionality of communications. This section presents devices that will help you quickly identify a malfunction:
1. The first most important thing is the multimeter. This is one of the main examples that allows you to identify technical problems. As for the model line, there are no special recommendations here. The main thing you need to focus on when searching for a product is the accuracy of the readings. You can judge this by reading the opinions of real users.
2. It is problematic to restore a sunken smartphone without an ultrasonic bath. No amount of fine, scrupulous cleaning with special products will save the situation! It is quite possible that you will restore the means of communication, but it will not work for very long. Guarantees should be given only if there is a special bath. Thanks to ultrasound vibrations, it is possible to achieve phenomenal results in seemingly hopeless situations. Practice knows many cases when in this way it was possible to restore hopeless “drowned people” for many years. The secret of effectiveness is quite simple - this is how the effects of oxides and the manifestation of sulfations are destroyed. Impeccable board cleaning quality is not difficult to achieve; to do this, you must follow the manufacturer’s standard recommendations.
3. An oscilloscope will provide significant support in solving complex problems. It is capable of measuring and then displaying various types of signals, showing operating amplitudes. In this case, too, there are no special recommendations. The main advice is to try to choose a sample with fairly accurate readings.
4. Essential repair tool mobile phones today it is regular computer, any laptop. Don't chase high performance, fashion model. Better spend these funds on diagnostic products. Make sure to install the appropriate software, to make it more convenient to work when flashing phones. It is impossible to foresee all situations, so you will definitely need Internet access to download programs and data.
5. You will need a certain set of programmers; there are a great many of them at the moment. There are universal products designed for communication equipment of several brands. There are narrowly targeted samples designed to work with a single manufacturer. There is no clear recommendation for choice. Preferences must be taken into account potential clients in the area where the service is located, listen to the opinions of more experienced colleagues.

When choosing the equipment you like, never be in a hurry. Always compare it with other items produced under a different brand. Compare cost, performance, accuracy, ease of use. Don’t be lazy to get acquainted with the responses of consumers who have already formed their own opinion about the possibilities specific device. Then the risk of error in the selection process will be significantly reduced.

Are you thinking about how to open a phone repair shop? Detailed instructions, calculation tables and useful tips for you in this article.

♦ Capital investments – 150,000 rubles
♦ Payback – 7–8 months

Mobile phones have long ceased to be luxury items and have become a necessity accessible to everyone. Today, a mobile phone can be found in anyone’s pocket.

Since the price of mobile phones varies, it is clear that cheap models will break.

Few people, having discovered that their mobile phone is broken, will immediately throw it away and go to the store for another one. Most will first go to a repair shop and pay for the repair.

If you understand the devices of mobile phones, and friends often turn to you about this, then why not think about how to open a phone repair service center.

You don’t have to invest a lot of money in launching a startup, and you can earn relatively well each month.

Are there any reasons to open a phone repair center?

This business has many advantages:

Minimal capital investment and the opportunity to save on many stages of starting a business.
If you are a highly qualified specialist (or you have hired such specialists) and are able to fix any breakdown, you can set any prices for your services.
An opportunity to develop your business in the future, for example, to repair laptops, tablets and other equipment.
You can also combine services: repair service + sale of batteries, chargers, accessories for mobile phones, etc.
Minimal monetary risk.
Firstly, you don't have to invest a lot of money into your business.
Secondly, if you earn less than you wanted, you can always cover your workshop by putting up tools for sale.
You don’t have to pay suppliers for unsold goods or sell leftovers for a long time in order to get back at least some of the money invested.
Demand for phone repair services among the population.
No matter how many service centers operate in your city, it always makes sense to open another one.

Are there any reasons not to open a phone repair shop?

If we talk about the shortcomings of this business, then among the most obvious:

high level of competition in this sector;
relatively small monthly income;
business relies on specialists, and if your competitors managed to hire a technician who can easily fix any breakdown, but you don’t have one, then people will visit the competitor’s service center, not yours.

In what cases should you open a phone repair center?

It makes sense to enter this business:

Highly qualified specialists who have been repairing phones, laptops and other equipment for a long time as a hobby or as an employee.

Why not open your own business?

Managers who can make any startup profitable.

If you are looking for a promising idea in which to invest money, then you should think about opening a repair shop.
You just need to find a good specialist and start earning money.

What should you do first to open a service center?

Launching a startup involves completing several mandatory steps at the preparatory stage:

Thinking through all the pros and cons (you must find reinforced concrete arguments why you should open this particular business and not another).
with specific calculations.
Theoretical study of this field of activity.
Search for the main components of your future business: premises, a telephone repairman, if you are going to serve as a manager. Only after this can you begin to register the case.

Two forms of opening a service center

This business is good because it allows entrepreneurs to choose what exactly to open:

Legal service center.

You register as an individual entrepreneur, rent an office with a specific legal address, pay taxes, etc.
This method is suitable for both craftsmen who intend to repair phones themselves, and managers who want to perform only an intermediary function.

Illegal workshop.

Let's say you are good at repairing phones and other equipment.
Friends and acquaintances know this and regularly give you work, agreeing to pay for it.
All renovation work can be carried out right at home, and look for clients using word of mouth.
This method is not suitable for managers.

Two types of phone repair service center

All workshops are divided into two types:

You cooperate with a specific manufacturer, order spare parts from him, report on the work done, perform warranty service phones, etc.

You are not accountable to anyone and undertake to repair any phone models that clients bring to you.
In this case, difficulties may arise when ordering spare parts, and there will be no one to get advice from.

How to advertise a phone repair service center?

Big advertising campaign such a modest business does not require.

All you need is:

distribute business cards to all your potential and existing clients;
provide information on your page in in social networks that you have opened a workshop, and ask your friends to spread this information;
register on a local forum and tell the residents of your city that such a service is now available to them.

If you can fix most cell phone breakdowns and charge a reasonable price for it, then you can be sure that you will soon have a lot of customers.

Schedule for opening a phone repair service center

The preparatory stage of opening a workshop will not take you too much time.

In fact, the most difficult thing that awaits you is the registration procedure, which, due to bureaucratic delays, can last for several months.

If you can speed it up, then you can rent and arrange the premises and purchase tools quickly enough.

Things will go even faster if you don’t need a phone repairman, but you are going to perform his functions yourself.

Stage	Jan.	Feb.	March	Apr.
Registration and obtaining necessary permits
Rent of premises and repairs therein (if necessary)
Purchasing tools for craftsmen’s work
Advertising campaign
Opening

Business plan for opening a phone repair service center

To understand how much money you need to start a service center and what steps you need to take care of, check out this business plan.

Let's say you decide to open a workshop in one of the big cities.

You are going to repair the equipment yourself, so you will not hire a technician.

Registration

Interesting fact:
Most popular phone was and remains the Nokia 1100, which was owned by 250,000,000 people. The phone has been available in all stores since 2003.

It is better to start the registration procedure not immediately after the idea arises, but to work illegally for a while.

And only when you realize that you are able to bring broken phones back to life and you have formed at least a small client base, you can submit documents for registration.

Room

To open a repair shop, you do not need a large premises. A room of 20–30 square meters is enough. meters.

Open your center where it will be easy for customers to find it: in the city center or in a densely populated residential area.

You don’t have to worry about the decor of the room, since clients will be interested in your qualifications, and not the color of the office walls.

If you are going to cooperate with a master on a fee basis, and retain the functions of a manager, then a reasonable step would be to open a business in one of the popular shopping centers in your city.

All you need is a small corner where you can sell spare parts and accessories for phones and accept broken models for repair.

The master will be able to bring already repaired models once a day and pick them up new job. Thus, a specialist will be able to work at home, and you will be able to save on rent and expand the range of services of your business.

Workshop tools and equipment

We remember that our room is small, which means we shouldn’t clutter it with unnecessary furniture.

To work properly, you just need to purchase:

Expense item	Amount (in rub.)
Total:	55,000 rub.
Table	8 000
Chair or work chair	1 500
Table lamp	1 000
Laptop	18 000
Safe	10 000
Telephone set	800
Lockers for changing clothes and storing personal belongings	5 000
Rack or shelf for storing tools and spare parts	3 000
Other	7 700

You will also need a minimum set of tools to perform standard phone repair work.

Expense item	Amount (in rub.)
Total:	35,000 rub.
Soldering station with hair dryer	4 000
Ultrasonic bath	2 000
UFS-3 box + HWK programmer with cable set	6 000
power unit	2 000
Digital oscilloscope	8 000
Vacuum tweezers	1 000
A set of miniature tools (screwdrivers, tweezers, etc.)	5 000
Other	7 000

Staff

In the first stages of work, until you form a client base and promote your business, you can do without staff at all.

If you want, you can hire a part-time cleaner and part-time accountant.

Once your phone repair service center becomes popular, you should consider hiring a sales rep.

How much does it cost to open a phone repair center?

You really don't need huge amounts of money to launch this startup.

It is enough to have 150,000 rubles.

Monthly expenses in this type of business are small and will mainly go towards renting premises, taxes, internet and purchasing tools.

You can easily meet the amount of 30–40,000 rubles.

How much can you earn with a phone repair shop?

It is impossible to name the exact amount.

The formula for making money is simple: the more orders you have, the more money you can earn every month.

Form a reasonable pricing policy, but not at a loss. When telling your client the price, add 100% to the parts you used to fix the phone.

If you serve at least 5 clients a day, your daily revenue will be at least 3,000 rubles.

Even working with two days off a week, you can earn about 60,000 rubles a month.

That is, the net profit is about 20,000 rubles.

At the initial stage, we invested 150,000 rubles. In this situation, they will pay for themselves in 7–8 months.

We also invite you to watch a video about

where to start opening a phone repair service center:

5 tips for those who are planning to open a phone repair shop:

Give realistic time frames for repairs so as not to disappoint the client.
Even taking into account the order of spare parts, the phone repair period should not be more than 14 days.
If you can't handle the volume of orders, hire an assistant.
Be honest with the client: if the phone cannot be repaired, you should be honest about it.
You should have a minimum set of spare parts and tools, but you should not collect too many “in reserve”.
Do not rush to name the price for phone repair.
The breakdown may be more serious than you thought at first glance, and if you decide to charge the client more than you initially quoted, he will decide that you are trying to deceive him.

Now you know, how to open a phone repair shop, and if you have the necessary knowledge and skills, then take a close look at this type of business.

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Hand tools

Power supplies

Quite often, visitors bring broken gadgets to service centers in a completely discharged state. Be sure to have a charger available that can charge any battery. In this case, there will be no difficulties when testing the performance of the electronics.

Soldering equipment

Magnifying devices

Measuring instruments

Identifying a complex breakdown using experience alone is not at all easy, and sometimes impossible. To achieve the goal, you will need special equipment for telephone repair, which is used to test the functionality of communications. This section presents devices that will help you quickly identify a malfunction:
1. The first most important thing is the multimeter. This is one of the main examples that allows you to identify technical problems. As for the model line, there are no special recommendations here. The main thing you need to focus on when searching for a product is the accuracy of the readings. You can judge this by reading the opinions of real users.
2. It is problematic to restore a sunken smartphone without an ultrasonic bath. No amount of fine, scrupulous cleaning with special products will save the situation! It is quite possible that you will restore the means of communication, but it will not work for very long. Guarantees should be given only if there is a special bath. Thanks to ultrasound vibrations, it is possible to achieve phenomenal results in seemingly hopeless situations. Practice knows many cases when in this way it was possible to restore hopeless “drowned people” for many years. The secret of effectiveness is quite simple - this is how the effects of oxides and the manifestation of sulfations are destroyed. Impeccable board cleaning quality is not difficult to achieve; to do this, you must follow the manufacturer’s standard recommendations.
3. An oscilloscope will provide significant support in solving complex problems. It is capable of measuring and then displaying various types of signals, showing operating amplitudes. In this case, too, there are no special recommendations. The main advice is to try to choose a sample with fairly accurate readings.
4. The most important tool for repairing mobile phones today is a regular computer, or a laptop. Don't go for high performance, fashionable model. Better spend these funds on diagnostic products. Make sure to install the appropriate software to make it more convenient to work when flashing phones. It is impossible to foresee all situations, so you will definitely need Internet access to download programs and data.
5. You will need a certain set of programmers; there are a great many of them at the moment. There are universal products designed for communication equipment of several brands. There are narrowly targeted samples designed to work with a single manufacturer. There is no clear recommendation for choice. It is necessary to take into account the preferences of potential clients in the area where the service is located, and listen to the opinions of more experienced colleagues.

When choosing the equipment you like, never be in a hurry. Always compare it with other items produced under a different brand. Compare cost, performance, accuracy, ease of use. Don’t be lazy to get acquainted with the responses of consumers who have already formed their own opinion about the capabilities of a particular device. Then the risk of error in the selection process will be significantly reduced.

Naturally, to repair phones you need tools and equipment. Moreover, the more complex the repair is, the more complex and expensive equipment will be needed. You can't get by with screwdrivers alone. So, I'll start with the bare minimum:

1. Screwdriver Set. To begin with, you will need ordinary flat and figured (Phillips) screwdrivers, preferably small ones + at least 3 star-type screwdrivers. They have exactly the same shape and differ only in size. First we need sizes T5, T6, T7. These are the most popular screw sizes for mobile phones and similar equipment. You can also purchase a set of screwdrivers, which immediately contains all the necessary types of replaceable attachments. The inconvenience of such a set is that you often have to change the attachments.

2. Scalpel. An indispensable thing for stripping wires, tracks, etc. You can buy it at any pharmacy. It is preferable, of course, to use old domestic scalpels, since they are practically eternal. The current ones become dull very quickly and all sorts of nicks appear on the blade.

3. Set of tweezers . It is advisable to have at least 2 types: straight and curved. You will appreciate the advantages of each during the renovation process. You can get by with just one, but in some cases you just need to crawl into a hard-to-reach place with the help of one or the other.

4. Pencil-eraser-brush . A very convenient thing. At first glance, it looks like an ordinary pencil, but instead of the usual rod, it has a rod made of an eraser (eraser). Designed to clean contact surfaces from oxides, dirt, stains, etc. After this treatment, the contacts look like new – shiny and beautiful. On the back side of the pencil there is a brush, which is very convenient for sweeping away “erasing products”, as well as regular saws and similar dirt that accumulates during the use of the phone.

5. Toothbrush– new or used (most importantly, not vice versa). Designed mainly to remove small oxides resulting from moisture entering the phone. Used in conjunction with special liquid (“wash”).

6. Multimeter- a very necessary device. The method of different measurements allows you to learn a lot about the condition of the phone and is one of the main devices in diagnosing faults and repairing the phone. The multimeter model is not critical, since everyone has necessary functions. I’ll just say that you shouldn’t buy the cheapest “China” ones, as they are unreliable and the measurement readings are not always accurate.

7. Universal mains charger . Also a must have in your arsenal. Allows you to charge any battery cell phone, digital camera, which is very important during the repair process. After all, devices often arrive with discharged batteries and without their standard charger (over time, of course, you need to acquire all possible chargers and preferably original). This is where this SZU, popularly called “crab”, “frog”, etc., comes to the rescue.

8. Hot air soldering station . Required. Without it, complex repairs (with resoldering of chips, filters, etc.) cannot be done. Designed for dismantling and subsequent installation of chips in a BGA case (and there are practically no others in a modern phone) by heating it with a stream of directed hot air with adjustable flow force and temperature.

9. Microscope.It is necessary for a thorough visual inspection of the mobile phone board and its components during the repair process, as well as when performing delicate work using soldering, the accuracy of installation of BGA chips and other elements (positioning) into their seats, as well as subsequent control. You can choose a suitable microscope on the websiteoptical instruments in Rostov-on-Don.

10. Card holder. An indispensable thing when repairing complex microelectronics. Allows you to securely hold boards of different sizes, thereby facilitating the work of the master, since there is no need to hold the board with your hand. Structurally, they come in a variety of configurations and sizes.

11. Ultrasonic bath (USB) . Without it about repairs cell phones that have been exposed to moisture, water, beer, coffee J, etc. you can forget. We all know that electronics are not friendly with water and its derivatives. Numerous oxides with their miracles instantly appear along all circuits (especially the supply ones). It is impossible to clean such a board using the usual dry mechanical method. You have to resort to special cleaning. liquids using a rough brush. By the way, I’ll say right away - all kinds of colognes and alcohol are not suitable!!! But, more often than not, this cleaning method is ineffective, since moisture penetrates into all possible and impossible places and brings us, repairmen, many problems. But not everything is so bad if there is ultrasonic bath. Again, a warning - the well-known “Retona” is not what we need and has nothing to do with our business.
Very easy to use and relatively reliable under normal use. It works something like this: either only distilled water is poured into the bath itself, or the same water is poured into it, but with a small addition of various products that make washing the board a little easier. These are different solvents like “Mr. Muscle”, “FAIRY” and the like. The level fills approximately a little more than half of the bath. Next, the previously soaked and oxidized board is placed in the bath, and then the ultrasonic cleaning process itself is started.

Such RAS most often have two fixed power levels - usually 30W and 50-60W, which are switched on separately. The ultrasonic cleaning process looks like this: a radiating element (piezoquartz) is rigidly attached to the bottom of the bath itself, which emits vibrations with a frequency of approximately 40 - 60 KHz and mechanically transmits them through the bottom of the bath itself to the liquid that is poured into it. Further, due to cavitation (cavitation is the propagation of sound waves in a liquid), the board is washed, as well as the splitting and destruction of the formed oxides and sulfations on the surface of the board and elements.

The ultrasonic bath does not require special care. The main thing is to prevent liquid from spilling inside the case, otherwise failure is inevitable. If the case is not sealed, it is advisable to do this in advance with a regular sealant. It is also not recommended to turn on the RAS idle or with a liquid level much lower than average, since the piezoelement will be heavily loaded and may fail prematurely.

12. BGA - stencils and BGA - paste . It is unlikely to be a useful necessity for beginners, but if you plan to seriously engage in reballing BGA chips, then you simply need these materials.

And here's why. The design feature of microcircuits in a BGA package provides for the absence of the usual contact pins, which can be soldered with an ordinary thin soldering iron. Flat contact pads are located on the bottom of the case, and soldering of such a chip to the board is carried out by applying solder to the contact pads. As a result, they look like small balls, which must be the same size and shape. After which such a microcircuit is installed in its place and, after the solder melts, it settles a little, as a result of which the gap between the microcircuit and the board remains very tiny - just the size of the settled solder balls.

The fact is that if it becomes necessary to dismantle a BGA chip, then the molten solder balls will break off when the chip is removed. One part of the solder remains on the board, the other on the chip itself. It is impossible to install such a chip back without preparing (rolling) new contact solder balls. For this we need stencils and solder paste for BGA reballing.

As for solder paste for rolling new balls on BGA chips, the choice here is made after testing several brands and types. As they say - to each his own. Some people need it thicker, others more liquid.

13. No-clean flux-gel . Used for soldering radio-electronic components. It has high temperature boiling, therefore it is excellent for mounting chips in BGA packages with a short distance between the contact balls, pins and the board surface. No-clean means it has no chemical activity after soldering and, accordingly, does not cause corrosive damage to the soldered elements in the event that it is impossible to remove flux residues. Also, after hardening, the flux forms a certain film on the elements and between them, which provides additional protection against oxidation and moisture.

14. Braid for desoldering . Designed for preparing soldering areas and used to remove excess solder on contact pads. Ideal for preparing solder joints for BGA chips.

15. Electric soldering iron 25W and 40W. For soldering massive discrete elements with large heat dissipation. They are used less frequently in mobile phone repair, but they are definitely needed. For example, they warm up the seats of charging connectors, headsets, etc. well.

16. Power supply (PSU) . When repairing phones, and not only, it is simply necessary. When diagnosing and repairing, it becomes necessary to power the device from the power supply in order to monitor certain processes, as well as in the event of a complete discharge of the battery or its absence. For our purposes, an adjustable power supply with an output voltage of 0 - 15 Volts and a current of 1 Ampere or more is suitable. When choosing a power supply, you should pay attention to the presence of voltage and current indicators in it, since during diagnostics and repairs we need to control these parameters. PSUs with digital and analog (arrow) indicators are sold. So, it is preferable to have a power supply with analog indicators, since they are visually much more informative, especially with rapidly changing processes due to their very low inertia. Digital indicators are not always able to display changes in one or another parameter and, most often, display only extreme values.

Most often, power supplies are supplied with only a power cord, and at the output there are only terminals-clamps for connecting the connecting wires with which the consumer will be connected. It is very convenient to connect red and black wires to the “+” and “-” terminals, respectively, at the ends of which fasten small alligator clips.

17. Oscilloscope– an electronic device that is designed to measure and subsequently visually display on the screen a wide variety of quantities and signals, their amplitude and shape. There are the most different types. There are no special requirements for this device, the main thing is that it is in good working order and has a bandwidth of at least 50 - 100 MHz. Well, which one to choose - on a cathode ray tube or with an LCD, large or small - is up to you. Here the question is the price and your capabilities.

18. Computer with Internet access. It all depends on your preferences. As for the computer, it is for repair that high performance is not required. The main thing is that programs load quickly and it is comfortable to work in them. There is only one caveat: to work with phones that require updating or restoring software, the computer must be protected from accidental power surges in the network or even shutting it off. For these purposes it is necessary to use the source uninterruptible power supply(UPS) or, preferably, a laptop. For software repairs, it is recommended to have a separate computer on which only programs for working with the appropriate programmers are installed and, of course, a set of all current firmware for the maximum possible number of phones. In any case, if the computer is connected to the Internet, downloading this or that firmware will not be difficult.

19. Set of programmers for software repair of cell phones. There are a large number of programmers, both universal - with support for a large number of phone brands, and designed for a specific brand (manufacturer) of phones. There is no single best one. Therefore, before purchasing, you need to familiarize yourself with the capabilities of several and choose according to your financial capabilities and, accordingly, your repair needs. And, as necessary, purchase the necessary programmers.