Replacing the broken glass on the back of the Xiaomi Poco M3 smartphone is a procedure that requires not only accuracy, but also an understanding of the internal architecture of the device. Unlike many modern gadgets, where the back cover is a non-removable element, in this model it is glued, but structurally replaceable. Self-intervention saves significant money on the services of the service center, but the risk of damage to fragile plumes or internal components remains high.
The process of disassembling the case begins with an assessment of the extent of damage and the preparation of the workplace. You will need to provide good lighting and free space so that small screws do not get lost in the pile of the carpet or on the table. Ignoring the safety rules when working with lithium polymer batteries can lead to unpleasant consequences, including fire.
Before any manipulations begin, you need to completely turn off the power of the device. This is a critical step, because accidentally shorting the contacts when the plumes are disconnected can disable the motherboard. The back cover of the Poco M3 is held on a powerful layer of glue around the perimeter and one screw under the logo. Without understanding this feature, it is easy to damage the glass by simply trying to tamper with it with a tool.
Tools and workplace preparation required
The success of the opening operation depends on the quality of the tooling used. You should not try to replace the glass using kitchen knives or stationery blades, as they can slip and damage the display or injure the fingers. Professional approach requires a specialized kit for repairing mobile equipment.
The main tool for softening the glue is a hair dryer or thermotable. Household hair dryers often do not give enough temperature, so it is better to use a building hair dryer with the ability to adjust the temperature or a special heating pad. The temperature regime should be strictly controlled so as not to overheat the battery or display matrix located in the immediate vicinity of the heating zone.
- 🔧 Precision screwdrivers (cross-haired) P2/P5 and flat) for screw twisting.
- 🌡️ Hair dryer or heating panel for uniform heating of adhesive base.
- 🎸 Mediators, plastic shoulder blades and suction cup for safe opening.
- 🧴 Clay. B-7000 or E-8000 final sealing.
- 🧤 Antistatic gloves and tweezers for working with small details.
⚠️ Warning: Never heat the back cover above 80-90 Long-term exposure to high temperatures can cause the battery to bloat or detach the polarizing film on the display.
Prepare a section container or magnetic mat to sort screws. The Poco M3 uses screws of different lengths, and entanglement of their places during assembly can damage the internal components or inability to close the body. The organization of the workspace is the key to successful repairs.
The process of heating and primary separation of the cover
The first step is to heat up the perimeter of the device evenly, and the glue used by Xiaomi makes it plastic when heated, allowing the glass to be separated without chipping, and the heating should start at the ends, paying special attention to the angles where the adhesive layer is usually thicker.
After 3-5 minutes of heating, try to gently lift the edge of the lid with a suction cup. If the glass does not respond, the heating procedure must be repeated. Do not use excessive force: if the lid does not move, then the glue is not yet warmed up enough, and you risk splitting the glass in half.
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Use an infrared thermometer to monitor surface temperature, and if you don't have one, drop a drop of water onto a heated area, which should hiss and evaporate, but not boil instantly.
Once you have a minimum gap, insert a thin metal probe or blade that's pre-wrapped with tape so you don't scratch the frame, and then you get plastic mediators, and you drive the tool along the perimeter, cutting the adhesive layer in translational motions, trying not to dive the tool deep inside the case.
Be very careful at the bottom of the smartphone, where the charging socket is located. The adhesive layer can be intermittent, and there is a high risk of damage to the charging port plume or microphone if you sharply pull the lid. Move slowly, feeling the resistance of the glue.
Dismantling the main panel and disconnecting the plumes
Once the adhesive layer has been overcome, don't rush to remove the lid completely. It can be fixed by a screw under the logo or have connected plumes. In the Poco M3, a screw is often found hidden under a decorative sticker or POCO logo on the back.
So, you can gently lift the lid and look at the insides, and if you see the screw, you can unscrew it with a screwdriver, and then you can finally remove the back panel, and you can access the battery and the protective plate that covers the connectors.
☑️ Check before disconnecting the plumes
The next step is to turn off the display and touchscreen plumes, and that means removing a metal plate that's screwed to the frame by a few screws, and unscrewing it, you get access to connectors that you need to snap off with a plastic blade or a nail.
The flipping motion should be directed upwards from the board. Never pull the plume behind the conductor itself because it's breaking. If the connector is sitting tight, sway it slightly from side to side, putting it on from different edges. Once all the plumes are turned off, you can completely remove the main board to replace the display or other components.
Replacement of the battery and work with the glue layer
In the Xiaomi Poco M3, the battery occupies a significant part of the internal volume and is also attached to double-sided tape. To extract it, you will need to apply heating again, but from the back, through the display (if it was not removed), or through the open rear if the battery is visible.
Use special plastic cards or thin blades to cut the glue under the battery. Move the tool parallel to the back wall, trying not to puncture the battery body. A puncture of the lithium battery can cause instant ignition, so act extremely carefully.
| Work segment | Tool. | Implementation time | Risk of error |
|---|---|---|---|
| Perimeter heating | Fen/Green | 3-5 minutes | Low. |
| Autopsy of the hull | Mediator/Suctioneer | 5-10 minutes | Medium. |
| Shutting down the plumes | Plastic spatula | 2-3 minutes | High-pitched |
| Battery replacement | Tweezers/Map | 10-15 minutes | High-pitched |
| Final assembly | Screwdrivers/Glue | 10-20 minutes | Medium. |
After removing the old battery and installing the new one, you need to clear the frame of the residue of the old glue. Use isopropyl alcohol and soft fabric. The surface should be perfectly smooth and fat-free before applying the new adhesive.
How to replace the original glue?
Assembly of the device and sealing of the housing
The final step is assembly and sealing. Put a thin layer of B-7000 or E-8000 glue on the body frame around the perimeter. Don't overdo it: excess glue can leak out or get inside into the contacts. Let the glue dry for 1-2 minutes to the sticky film.
Carefully align the lid with the body, starting at the top, and press tightly at the edges. Make sure all gaps are closed evenly. Use rubber harnesses or special clamps to fix, leaving the device to dry for 1-2 hours.
⚠️ Warning: Do not turn the phone on immediately after assembly. The glue must be fully polymerized, and the battery (if it was replaced) must undergo the initial calibration.
Once dry, wipe the body with a soft cloth, removing the glue residue. Check the touchscreen, speakers and communication modules. If all functions are working correctly, the procedure can be considered complete. The tightness is restored, and the device is ready for use.
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The quality of the final sealing directly affects the protection of the smartphone from dust and moisture in the future, so do not save on glue and drying time.