Many Chinese electronics owners face physical access to the internal components of the device, whether it's replacing broken display glass, installing a new battery, or cleaning the speaker from dust, the procedure requires accuracy. Incorrect opening can damage the plumes or damage the sealing of the case, which is why it's important to understand the specifics of your gadget's design before starting work.
Xiaomi’s current smartphones and Redmi’s sub-brand share similar build architectures, but there are nuances. Plastic back covers are easier to open than glass panels glued to a durable polymer glue. In this guide, we’ll look at the universal techniques that will work for most current models, including the Mi, Redmi Note and Poco series. Safety and accuracy are your main allies.
Before you start dismantling, you need to prepare the workspace, it should be well lit, the surface should be clean and not conduct electricity. You should not try to disassemble the phone on the knee or on the soft sofa, where small screws can get lost in the upholstery. Properly organized space reduces the risk of loss of parts and damage to fragile elements during repair.
Necessary tools for safe disassembly
There's no quality without the right tools. You can't use kitchen knives or stationery because you can't risk damaging the screen or scratching the frame. Professional craftsmen use a specialized kit that minimizes the risks. If you plan to do the repairs regularly, you'd better invest in a good toolkit.
The basis for the work will be a plastic blade or mediator. Metal tools should be used with extreme caution, mainly for screw unscrewing, but not for putting lids on. You will also need a suction cup to remove glass and plastic panels. To work with small screws, you need a set of screwdrivers that includes cross bits of size Phillips #000 and Phillips #00.
- 🔧 A set of precision screwdrivers with magnetic tips for working with small fasteners.
- 🎹 Plastic mediators (scapula) for careful snapping of latches without scratches.
- 🌡️ Hair dryer (construction or household) or heating platform for softening glue.
- 💧 Isopropyl alcohol or special liquid for dissolving adhesive base.
Pay special attention to the heating source. A normal hair dryer may not give you enough temperature, so it is better to use a power-adjusted building hair dryer or a special heating pad. The heating temperature should not exceed 80-90 ° C, so as not to damage the internal components or the display itself. Control the heating process with your hand, avoiding overheating the surface.
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Use a magnetic mat or a piece of paper with painted sectors to sort the screws, which will help you not confuse the fasteners of different lengths when you build them.
Preparation of the device for opening the shell
The first and most important step is to get the device ready. Never start disassembling the smartphone that's on. Even if the device is software-activated, there's still a charge in the battery that can short-circuit if the plume is accidentally damaged, so the first step should always be to turn the gadget off completely through the menu or hold the power button.
Then you need to remove the tray for SIM-It's standard, but it's often forgotten in a hurry, and if you try to open the case without taking out the tray, you can damage the mounting mechanism or the plastic frame itself. Use a special paper clip or a thin needle to extract the tray, pressing into the hole until a characteristic click.
⚠️ Warning: If your device has a protective glass on the back or a thick film, they must be carefully removed before heating. Otherwise, the glue under them may melt unevenly, and the film itself may deform and stain the body.
After removing the trays, inspect the perimeter of the device for visible screws. In modern Xiaomi models, the screws are often hidden under decorative caps or located under the tray. SIM-A careful visual inspection will help to avoid situations where when trying to open the lid, it cracks due to a forgotten fastener.
☑️ Preparation for disassembly
Technology of heating and removing the back cover
The process of disassembly begins with heating the perimeter of the body. The adhesive composition that fixes the back panel at room temperature is very hard and durable. The heating makes it elastic, allowing the panels to be separated without effort. Warm up the edges of the device evenly for 2-3 minutes, constantly moving the hair dryer so as not to overheat one point.
Once heated, take a suction cup and attach it to the bottom of the back cover. Pull the suction cup up slightly, creating a small gap between the frame and the lid. Insert a plastic spatula or mediator gently into the resulting gap. Don't inject the tool deep, 2-3 millimeters enough to start the separation process.
Move the shoulder blade along the perimeter, gradually cutting through the adhesive layer. Pay special attention to the corners where the glue is usually the most. If you feel strong resistance, stop pulling and warm up the area again. Sharp movements can lead to cracks, especially if the back cover is made of glass.
What to do if the lid does not open?
When all the latches are snapped, don't rush to remove the lid completely. It can be connected to the main board with a fingerprint scanner plume or a volume button integrated into the side frame. Lightly lift the lid and inspect the internal connections. If the plume is present, it must be gently disconnected, having opened the lock connector.
Access to internal components and protection of fees
When you remove the back cover, you'll see the inside of the smartphone, and most of the space is occupied by the battery, but the main nodes are covered by a plastic or metal cover, and this plate protects the motherboard from mechanical damage and shields the radio needles.
To remove the protective cover, you need to unscrew all the visible screws, which range from 6 to 12 depending on the model. Stack the screws in a separate container, as they can differ in length and thread. Once unscrewed, the lid is usually removed with a suction cup or plastic blade, as it can also be held on glue.
| Component | Location. | Precautions |
|---|---|---|
| Battery | Central part | Don't pierce, don't bend. |
| Display plume | Top of the pay | Disconnect only after removal of protection |
| Camera. | Upper corner | Don't touch the lens with your fingers |
| Charging charges | The bottom part | Careful with the microphone. |
Under the protective cover is the main display plume and battery connectors. Before any manipulation of the board, it is strongly recommended to turn off the battery, this will turn off the device and prevent accidental short circuits that can disable the power controller or other important units.
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The first step after removing the protection is to turn off the battery plume, which ensures the safety of all subsequent operations with electronics.
Features of disassembling models with a glass back panel
Xiaomi and Redmi’s flagship models often feature hardened glass backs, requiring greater care, more brittle than plastic, and can burst into small sharp shards when heated or pressurized.
When working with glass, heating time can be increased, but the temperature should remain controlled. It is recommended to use the "warm-cool" method: heat the edge, work a little, reheat the adjacent area. Do not try to separate the entire cover from one side at once.
- 🧤 Use thin gloves to avoid leaving greasy marks on the inside of the glass.
- 🧪 Apply a special glue B-7000 or E-8000 glass-panel.
- 🔍 Check the glass for microcracks before starting work to avoid cuts.
If the glass does crack, don't continue with your bare hands. The shrapnel can damage the internal components or injure you. Gently seal the crack with tape so it doesn't spread, and continue disassembling as much as possible to avoid pressure on the damaged area.
Another feature of glass models is that they have a more sophisticated wireless charging system, and there is often an extra module with a coil under the back cover, and when you remove the lid, make sure that you don't hook or damage this module or its plume going to the main board.
Assembly of the device and verification of functionality
After the necessary repairs or replacements, the assembly phase begins, which is done in reverse order, but also requires care. Make sure that all the plumes are securely fixed in the connectors, and the protective plates are screwed with all the screws, and the absence of even one screw can lead to backlash and breakage during operation.
Before you put the back cover in place, remove the residue of the old glue from the frame and the cover itself. Use alcohol and a plastic card to clean the surfaces. Then apply a new layer of special glue or install a new adhesive frame (water resistant circuit) if required by the design.
Press the lid evenly around the perimeter and lock the device with rubber harnesses or a load for 15-20 minutes, which will ensure reliable polymerization of the glue. After assembly, turn on the device and check all the functions: touchscreen, cameras, speakers, microphone and communication modules.
⚠️ Warning: If the phone doesn't turn on or doesn't work properly after assembly, don't panic. Most likely, some plume isn't fully inserted into the connector. Carefully reopen the case and recheck all connections, especially the main display plume and battery.
Testing for leakproofness is an important, but not always possible, step in the home. If you replace the adhesive frame with a waterproof, the device should retain the declared spray protection. However, you should not rely on this completely, since the factory quality of the assembly is difficult to reproduce at home.