Owning a modern Xiaomi or Redmi smartphone often requires internal interventions, whether it’s a critical battery drop, a broken display glass, or a desire to replace the speaker, the question of how to safely open the case becomes paramount. Modern gadgets are designed with a monolithic design in mind, making disassembly difficult for the untrained person.
The opening procedure requires not only physical action, but also a deep understanding of the design of the device. Incorrect application of force or use of inappropriate tools can lead to damage to plumes, cracks in the frame or, worst of all, to the fire of a lithium polymer battery. In this article, we will discuss the stages of dismantling, paying special attention to precautions and the specifics of adhesives.
Before you start, it's important to understand the risks. Opening the case almost always means losing the official manufacturer's warranty. If your device is still in warranty service, the only right solution is to go to an authorized service center. However, if the warranty has expired or the case is not warranty, you can proceed to self-repair, following strict discipline.
Preparation of the workplace and the necessary tool
Preparing the repair space is more than half the success of the whole operation.You will need a clean, well-lit surface, preferably white, to avoid losing small screws. Magnetic mat or a special screw card will help you not to confuse the fixtures of different sizes, as Xiaomi smartphones often use screws of different lengths for the same modules.
To safely open the case, you will need a specialized set of tools. The use of stationery knives or metal blades is strictly prohibited, as they can damage internal components or, touching the board, cause a short circuit.
- 🔥 Dryer or thermal panel for heating the adhesive layer around the perimeter of the housing.
- 🔧 Precision screwdriver kit (cross-hatch) P2, P5 hexagonal).
- 🎴 Plastic mediators and a sucker for peeling off the cover.
- 🧤 Antistatic gloves and tweezers with dielectric tips.
☑️ Ready to disassemble
Pay special attention to the source of heating.A common household hair dryer may not give enough temperature to soften the industrial adhesive used in flagships POCO And Xiaomi. The optimal temperature for the back cover is 80-90 Exceeding this temperature can cause plastic elements to deform or damage. OLED-matrix.
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Before the start of heating, be sure to remove SIM-The pressure inside the slot when heated can damage the contacts or the card itself.
Algorithm for Safe Removal of the Back Cover
The first step in the process of opening a Xiaomi phone is to turn off the device. Even if the phone is turned off, there may be a residual charge on the motherboard that can cause a short circuit when the tools come into contact with the components.
Heat the edges of the device evenly, moving the hair dryer in a circle. Do not hold the flow of hot air at one point for longer than 3-4 seconds. After the case becomes warm to the touch (but not burning), try to gently fit the edge of the cover with a mediator. If the tool enters with difficulty, the heating should continue.
⚠️ Warning: Never try to tear the lid off by force unless it is moving away.This is a sure sign that the glue is not yet warmed up, and you risk splitting the glass back or damaging the fingerprint scanner built into the power button.
Move a plastic card or mediator along the perimeter, gradually cutting the adhesive layer. On some models, such as the Redmi Note series, the adhesive can be applied not only at the edges, but also in the central part under the logo. Act slowly, controlling the depth of the instrument's immersion so as not to touch the plumes coming from the volume and power buttons.
Disabling plumes and dismantling the protective panel
When you successfully remove the back cover, you'll see the inside of the smartphone, and the battery occupies the center part, and above it is a protective plate or a plastic panel that hides the connectors, and this panel is attached to a lot of screws of different calibers that need to be twisted and unfolded in strict order.
Removing the protective panel requires special care, and underneath it are the main plumes of the display, the connectors of the cameras and the charging module. Often the panel is glued to the frame with double-sided tape, so after twisting the screws, it must be carefully lifted with a mediator, sharp movements are unacceptable here.
The next critical step is to turn off the battery, which is the first step you have to take before touching any other components. Decoupling the battery turns off the device and eliminates the risk of short circuits when you accidentally touch the board with a metal tool. Use a plastic blade to turn off, pressing the connector upwards, not sideways.
- 🔋 Carefully disconnect the main battery connector from the motherboard.
- 📱 Turn off the main display plume (often paired with a touchscreen).
- 📷 Remove the connectors of the main and front cameras if you plan to replace them.
- 🔌 Disconnect the bottom board plume (sub-board) where the charging connector is located.
Only after the battery is completely de-energized can you start disassembling it further, and if your goal is to replace the screen, you can now unscrew the screws that hold the display frame. If the battery changes, move on to the next section, and remember that plumes are very fragile, and damage to them leads to expensive repairs.
Replacement of the battery and work with adhesive layers
In Xiaomi and Redmi smartphones, the battery is usually fixed to double-sided tape or special glue. You can never use metal objects to extract an old battery cell that can puncture the battery body. A lithium-ion cell puncture causes an instant chemical reaction with heat and smoke.
The best way to extract it is to use a thin line, floss or a special plastic card. Stretching the thread over the top edge of the battery and cutting movements will cut the adhesive layer. Preheating the back of the case (if the lid is already removed, you need to warm carefully so as not to damage the display on the back side) will facilitate this process.
When installing a new battery, it is important to properly prepare the seat. The old glue must be completely removed. To fix the new cell, use a special glue B-7000 or ready-made adhesive strips (sticker), which often come with quality batteries.
How to check the status of the battery?
Once you have the new element installed and the plume plugged in, don't rush to twist all the screws. Test the device. Check the touchscreen response, the cameras and the charging. If everything is working correctly, you can start the final assembly.
Specifics of disassembly of models with glass case
Xiaomi’s flagship models, such as the Mi and Xiaomi 11/12/13/14 series, often feature glass rear panels, requiring increased caution as glass behaves differently when heated and mechanically exposed than plastic or metal, and glass is more fragile and prone to microcracks that can break apart during operation.
When heating the glass cover, it's important not to overheat the display on the front side. 90-100 The degree of damage can be caused by organic compounds in OLED-You can use a thermometer or control the temperature with your hand, and the body doesn't have to be too hot to hold.
The adhesive composition in glass models is often more aggressive and requires longer warming. When unsticking the lid, use a suction cup to create uniform tension, and only work on the edge with the mediator. The movements should be smooth, without jerks.
Comparative table of the complexity of disassembly
To understand the scope of work you will encounter, we compare the complexity of disassembling different types of Xiaomi devices, which is relevant for most models released in the last 3-4 years.
| Type of device | Cover material | Difficulty | Risk of damage |
|---|---|---|---|
| Budget (Redmi A/C) | Plastic (removable) | Low. | Minimum |
| Medium (Redmi Note) | Plastic/Glass (glue) | Medium | Medium (trains) |
| Flagship (Xiaomi/Poco F) | Glass/ceramics | Tall. | Tall (screen, cover) |
| The Game (Black Shark) | Glass/Metal | Very high. | Critical (cooling) |
As you can see from the table, mid- and high-end devices require significantly more skill, use a denser layout of the motherboard, and the cooling system can take up considerable space, interfering with battery access.
Assembly and final seal check
The final step is to assemble the device. Before installing the back cover, make sure that all the screws of the protective panel are twisted and the plumes sit tight until the characteristic click. Make sure that there are no villi or dust left under the plumes that can cause bad contact.
Use a special glue or reconstitutive tape to stick the lid. Apply a thin layer of glue around the perimeter, avoiding cameras, flash and sensors. Once the parts of the device are connected, it is recommended to fix the smartphone with rubber bands for 15-20 minutes to polymerize the glue.
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The quality of gluing determines not only the appearance, but also the protection of internal components from dust and moisture, so you can not save on the adhesive composition.
Once assembled, perform a full diagnostic. Check all buttons, vibrator, speaker and microphones. Take a few test shots on all cameras, including autofocus, and if all systems are working properly, the disassembly and repair process can be considered successful.