Modern Xiaomi and Redmi smartphones are designed with aesthetic integrity, which often makes it difficult to access internal components without special skills. Users face the need to open the case when replacing broken glass, installing a new battery or cleaning the speakers from dust. Opening the rear cover is the first and most critical stage of any repair, a mistake in which can damage the plumes or the glass itself.
Unlike older removable battery models, modern devices require careful heating of the adhesive layer and the use of thin tools. The dismantling process is highly dependent on the housing material: plastic behaves differently when heated than glass or metal. In this article, we will discuss in detail the algorithm of actions that will help you safely access the hardware of your gadget.
Before any manipulations begin, it is necessary to assess the risks and prepare the workplace. The manufacturer's warranty obligations will be canceled immediately after a seal is broken or there are traces of opening on the screws. If the device is warranted and has a factory defect, it is wiser to contact an authorized service center than to risk trying to open the lid yourself.
Preparation of the workplace and tools
The quality of the repair depends on the preparation. You will need not only a set of screwdrivers, but also specific tools for working with adhesive joints. Hair dryers (construction or household with a narrow nozzle) are necessary to soften the glue, and a suction cup will help create the initial gap between the frame and the lid.
Organize the space so that small screws do not get lost, a magnetic mat or a sheet of paper with markup will help not to confuse the fasteners of different sizes, Medical alcohol or a special opening fluid (for example, B-7000) will be required for the final cleaning of the frame before gluing.
☑️ Autopsy tools
Pay special attention to lighting. Small plumes and connectors are not visible in dim light, which increases the risk of accidental damage to components. A bright lamp with a cold spectrum will allow you to see all the nuances of the design.
Algorithm of heating and creating gap
The main task at this stage is to heat the adhesive layer around the perimeter of the device without overheating the internal components. A temperature of 80-90 degrees Celsius is usually sufficient to soften the adhesive, but not enough to damage the matrix or battery. Warm up the edges of the case evenly for 2-3 minutes, constantly moving the hair dryer.
⚠️ Do not send hot air to one point for longer 5-7 Local overheating can cause yellow spots on the display (if installed) or battery bloating.
After heating, try to gently pull the lid back with a suction cup. If you feel strong resistance, repeat the heating procedure. A mediator or a thin plastic card is inserted into the gap. Movements should be sliding along the edge, not directed inwards, so as not to touch the plumes.
Why can't you use a metal knife?
As you walk around the perimeter, you'll hear the characteristic crackling of adhesives coming off. In Xiaomi models with a metal body, there are often plastic inserts for antennas that require special care. A thin scalpel may be needed to cut particularly stubborn areas of glue in the corners.
Features of disassembling different models Xiaomi
Xiaomi, Redmi and POCO have their own designs: Budget models are often assembled on double-sided tape, which is easy to soften, flagship series use more complex adhesive compounds and have additional protection from moisture.
| Series of devices | Type of lid attachment | Difficulty autopsy | Risks. |
|---|---|---|---|
| Redmi Note (budget) | Double-sided scotch | Low. | Cracks on the glass with an idle jerk |
| Xiaomi Mi (flagships) | Liquid glue + screws | Tall. | Damage to the plume (scanner) |
| POCO (medium segment) | Combined glue | Medium | Detachment of iris film under glass |
| Xiaomi Mix (ceramics) | Special heat-glue | Extremely extreme. | Splitting the ceramic back during heating |
In some models, such as the Redmi Note series, the lid is relatively easy to remove, but requires caution in the area of the camera module. Here, the glass is often thicker, but also fragile at fracture. The modular design of modern smartphones implies that once you remove the lid, you will see a plastic frame covering the main board.
Wireless charging devices have a glass back panel that attaches to a very strong glue. Heating is mandatory and should be longer. Ceramic cases (like the Xiaomi Mi Mix) are afraid of sudden temperature changes, so you need to heat them slowly and evenly.
Disabling plumes and removing protection
Once the lid is lifted, don't rush to tear it completely. Inside, there are almost always plumes connecting the back panel (print scanner, flash, NFC antennas) to the motherboard. The scanner plume is the most vulnerable part, and breaking it will cause unlocking to fail.
Carefully bend the edge of the case and inspect the insides in good light. If you see thin flat cables going to the lid, they must be turned off. To do this, with a nail or plastic blade, pull the connector up. The protective metal plate often covers the main connectors of the battery and display, it must be unscrewed before turning off.
- 🔋 Turn off the battery first to turn off the device and avoid short circuits.
- 🔌 Use a plastic spatula to snap connectors away, avoiding pressure on the board itself.
- 📸 Be careful with the main camera plume if it passes near the autopsy area.
Only after all connections are turned off can the back cover be completely removed and put in a safe place. The sticky surface of the cover can collect dust, so it is better to immediately cover it with a protective film or put it on a clean wipe.
⚠️ Warning: Never pull the plume! If the connector doesn't snap, check if there's a latch or extra glue.
Replacement of battery and internal components
Once you have access to the insides, you can replace the battery that has failed. In Xiaomi smartphones, the battery is usually glued to a frame or plastic base. Use a special hood or suction cup to extract it, preheating the battery area with a hairdryer.
You can't really kick a battery with sharp objects, because a puncture in the shell will cause an instantaneous fire, and the opening thread (a thin line or string) is the best tool for neatly separating an old battery, and hold it under the battery with sawing movements.
💡
Before installing a new battery, be sure to remove the remnants of the old glue from the frame. Use isopropyl alcohol and a plastic card to clean the surface.
When installing a new battery, make sure the connector sits tight and up to the click. If you change other components, such as the charging module or speaker, make sure that the plumes are properly stacked so that they are not clamped during assembly. A test assembly without glue will help check the health of all systems before the final fix!
Assembly and sealing of the shell
The final step is to get the device back to its original state, and clean the frame and the lid of the old glue with alcohol or a special solvent, and degreasing the surfaces is the key to good adhesion of the new adhesive layer, and the B-7000 or T-7000 adhesive is perfect for this purpose.
Apply a thin layer of glue around the perimeter of the frame, avoiding entering the holes of the speakers and cameras. Let the glue dry for 1-2 minutes to "Velcro", then carefully align the lid with the body.
For better fixation, use rubber straps or stationery rubber bands, pulling them on the phone 15-20 It's going to keep the fit even and prevent the cracks from coming in, and the water protection at home isn't completely regenerated, but the tight fit will protect you from dust and splashes.
💡
Cleaning the frame of old glue and degreasing are key factors in successful assembly, and the residue of the glue will create irregularities, and the lid will luft.
Once the glue is dry, turn on the device and check all the functions: touchscreen, cameras, speakers and fingerprint scanner. If everything is working correctly, the repair can be considered complete.