How to open a phone Xiaomi Poco M3: professional instructions

Smartphone Xiaomi Poco M3 has established itself as a reliable device with excellent autonomy, but over time, any gadget requires maintenance. Most often users are faced with the need to replace a broken screen or a swollen battery, which requires opening the case. Self-disassembly allows you to save a significant amount on the services of a service center, but requires accuracy and understanding of the design of the device.

The process of dismantling components in the Poco series has its own peculiarities associated with the use of a plastic back cover and adhesive joint. Wrong actions can damage the plumes or chips on the body, so it is important to follow the algorithm clearly. In this article, we will look in detail what tools you will need and how to safely open the phone to access internal nodes.

Before you start, you need to make sure you have enough space and good lighting, and rushing to do that is the enemy, because one wrong jerk can break thin connectors, and we've developed a step-by-step guide to help you complete the procedure without putting your device at risk.

Tools and workplace preparation required

Quality training is key to successfully disassembling any electronic device. You will need a specific set of tools to work with the Poco M3, since a standard home screwdriver set may not be enough, and special attention should be paid to tools for working with adhesive joints, since the back cover is attached to the glue.

The best solution would be to use a professional smartphone repair kit, often referred to as a "geek kit," which usually contains all the necessary bits and suckers, and if you don't have one, you can pick up the analogs separately, as long as the tools are magnetic and easy to work with.

• 🔧 A set of cruciform sting screwdrivers (PH000 or PH00) flat-slide.
• 🔥 A hair dryer or thermophen to heat the perimeter of the case (you can use a household hair dryer at maximum temperature).
• 💳 Plastic mediators or old plastic cards for snapping latches.
• 🧲 Magnetic mat or tray for sorting screws so as not to lose them in the process.

It is also highly recommended to turn off the device before any manipulations, if the screen is broken and does not respond to touch, press the power button for 10-15 seconds to force reboot or wait for the battery to completely discharge if possible, this will eliminate the risk of short circuit when disconnecting the plumes.

⚠️ Note: Using a metal knife instead of a plastic mediator to open the case is strictly prohibited.The metal can damage the battery or close contacts on the board, which will lead to fire or failure of the smartphone.

Organize the workplace so that no foreign objects interfere with the process. Light should fall evenly, without creating glare on glossy surfaces. If you have an antistatic bracelet, use it, although this is not always critical for household repairs, but an extra safety measure will not hurt.

Removal of the back cover and dismantling of the frame

The first step in how to open a Xiaomi Poco M3 phone is to carefully remove the back panel. Since it is made of plastic and glued around the perimeter, you need to heat up the adhesive layer. Heat should be done evenly, driving a hairdryer along all the faces for 2-3 minutes. Don't keep the hair dryer at one point too long to not melt the plastic.

After enough warming, insert the suction cup into the bottom of the back cover, closer to the charging socket, and pull up slightly to create a gap. Insert a thin plastic mediator into the resulting gap carefully. Driving the instrument along the perimeter, gradually releasing the adhesive joint, but do not remove the mediator completely until you have passed the entire circle.

When the adhesive layer is overcome, don't rush to pull the lid. There may be thin plumes inside, although there are none on the lid in the Poco M3, but it's better to be safe. Put the panel off at once, and put it away to a safe place away from the edge of the table. Now you have a view of the main frame covering most of the components.

The next step is to unscrew the screws that fix the plastic screen frame, and they can vary in number, but they're usually located around the perimeter and in the center. Use a magnetic screwdriver to keep the screws from falling across the table. After you unscrew all the visible screws, you need to carefully tuck the frame with a mediator.

⚠️ Attention: screws of different lengths may be in different holes. If you screw a long screw into the hole for a short one, you can punch the motherboard or damage the battery. Remember or photograph the location of each screw.

Removing the frame requires caution, because there are plumes of the display and touchscreen underneath it. Raise the frame from the opposite side of the plumes, slowly pulling it sideways. Don't put too much effort if something interferes, check if all screws are twisted.

Battery Disconnection and Component Dismantlement

Once the safety frame is removed, your first action should be to turn off the battery, a critical step to ensure that you can keep it safe, and the battery plume is located at the bottom of the board or side, depending on the revision, and is closed with a metal plate or plastic cap.

Carefully bend the connector lock (if any) or simply slid the plume with a plastic blade upwards. The movement should be directed strictly upwards, without distortion. After the power is turned off, you can safely perform any manipulation with other components without fear of short circuit.

• 🔋 Disconnect the main battery plume from the motherboard.
• 📱 Turn off the display plume and touch screen if you plan to replace them.
• 📷 Remove the main and front camera plume if you need to replace them.
• 🔊 Remove the lower speaker module (polyphone) if it interferes with access.

Removing the motherboard in the Poco M3 often requires removing additional metal screens that cover the processor and memory. They can be soldered or mounted on screws. If the screens are soldered and replacement is not planned, it is better not to touch them unless absolutely necessary. The main board is attached with several screws that need to be twisted.

Once all communications are shut down, the board should be freely retrieved, sometimes it can be held on the glue residue or sit tightly in the grooves, a slight sway from side to side will help free it, put the board on the antistatic surface with the components up.

Battery replacement and device assembly

The most common reason for disassembling the Xiaomi Poco M3 is to replace the battery. The old battery is quite difficult to remove, since it is glued to double-sided tape throughout the area. Do not try to tamper with metal objects in any case - this is a guaranteed fire.

The best way to remove an old battery is to use special hoods with suction cups or warm the back of the case (if the battery is still inside) or the battery itself through the open space. After heating, use a plastic card to gradually, millimeter by millimeter, cut off the adhesive layer.

The new battery should be checked with a multimeter before installation for voltage, and a new two-way tape for phones should be glued, make sure that the contacts of the battery are clean and not oxidized, and the installation is done in the reverse order: first fix the battery, then connect the plume.

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Residues of old glue from the frame of the case can be conveniently removed with isopropyl alcohol and a soft napkin. Do not use acetone or aggressive chemistry, they can melt the plastic frame.

The device is assembled in a strictly reverse sequence, first the motherboard is installed and the screws are fixed, then all the plumes are connected. Pay special attention to the correct positioning of the plumes - they must lie flat, without clamps. Once the battery is connected, you can check the health of the smartphone without fully collecting it.

Typical errors and precautions

Even experienced craftsmen sometimes make mistakes, let alone beginners who are first-time fixers, and one of the most common problems is that the touchscreen plume is damaged when you're not taking the frames off properly, and it's very thin and often glued to the frame, so you have to peel it off with heating.

Another common mistake is losing small screws or entanglement. The Poco M3 uses different lengths of screws for different nodes. Spinning a long screw into a short hole can cause the screw's point to rest on the motherboard and damage the tracks when tightened.

⚠️ Warning: If the phone doesn't turn on after assembly, don't rush to disassemble it again immediately. Check if the battery is fully charged. 15-30 minutes on charge to activate the power controller.

Static electricity is also worth remembering. Although modern boards are protected, dry air and synthetic clothing can generate discharges that can disable sensitive electronics. Work in cotton clothes and try not to touch contacts with your hands.

Frequently Asked Questions (FAQ)

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The main conclusion: disassembly Xiaomi Poco M3 is quite possible for a homemaker with a minimum set of tools and accuracy. Key points are high-quality warming up of the glue and careful handling of plumes.