Disassembling the Xiaomi Mi 8T is a process that requires maximum concentration, precision of movement and specialized equipment. Unlike many modern devices with non-removable covers, here the back panel is attached to a strong layer of glue, which creates certain difficulties in the initial opening of the case. Wrong actions at the start can damage the glass or, worse, to tear the fingerprint plume, which is laid very close to the edges.
The main purpose of this procedure is most often to replace a failed battery, restore a broken display or clean the internal components from dust. It is important to understand that the leakage of the housing after assembly will be broken, even if you use a new glue, so rely on moisture protection is no longer worth it. Before starting any work, you need to completely discharge the device before turning off to minimize the risk of short circuit when working with conductive cells.
In this article, we will take a detailed look at each stage of dismantling, paying special attention to hidden screws and fragile connections. You will learn how to safely disconnect the plumes without damaging the connectors on the motherboard, and what tools are really necessary for quality repair. Compliance with technology will allow you to carry out the replacement of components professionally, keeping all systems of the smartphone working.
To do a job successfully, you'll need a basic set of tools that are dangerous to get inside, and ignoring workplace preparation guidelines often results in the loss of small screws or damage to the matrix.
- 🔧 Hair dryer or heating pad for softening the glue around the perimeter of the body.
- 💳 Thin plastic card or mediator for peeling off panel.
- 🪛 Set of screwdrivers (cross-haired) P2 And Pentalobe, if you have one).
- 🧲 Magnetic mat for sorting screws by disassembly stages.
- 🧴 Isopropyl alcohol or special liquid B-7000 glue-removal.
⚠️ Warning: Never use metal blades or knives to pluck the back cover.The metal easily cuts through the protective films of the plumes and can damage the battery, which can cause ignition.
Preparation of the workplace and precautions
Before you start physically affecting the housing, you need to organize the right space, the surface must be clean, well-lit and not slippery, so that small parts do not roll into hard-to-reach places. Many craftsmen make the mistake of starting without turning off the power, which, if the battery contacts are accidentally closed, can disable the power controller on the board.
Be sure to remove the tray for SIM-This is a critical step, because a forgotten SIM card can damage the contacts or the tray itself when you try to remove it while you are disassembling it.
☑️ Pre-launch check
Heating temperature is a key parameter. Too little heating won't soften the glue, and you risk breaking the glass when you press it. OLED-A matrix that is just below the back cover, or deform the plastic elements of the frame. 80-90 degrees Celsius, you need to keep the hair dryer at a distance 3-5 See, constantly moving it around the perimeter.
Removal process of the back cover
Heat should be carried out evenly throughout the perimeter of the device for 2-3 minutes. Pay special attention to the corners, as there is a layer of glue usually thicker. After sufficient warming, take a suction cup, glue it at the bottom of the rear panel and slightly pull up, creating a small gap between the glass and the frame.
Insert a plastic mediator or a thin map into the gap, do not dive deeper than 3-4 mm to avoid hitting the internal components, use the tool along the long sides of the body, gradually cutting through the adhesive layer, and the movements should be sliding, not stabbing.
The secret to a successful autopsy
At the top of your smartphone, be very careful, because there's a fingerprint scanner plume going through, and it's glued to the inside of the glass, and it's connected to the motherboard, and if you jerk around, it's easy to tear that plume, and then the fingerprint unlock function will stop working, and it's expensive to replace.
- 👉 Heat the perimeter evenly without holding the hair dryer in one place.
- 👉 Use a suction cup to create an initial gap.
- 👉 Move the mediator smoothly by cutting the glue.
- 👉 At the top, work with utmost care because of the plume.
Dismantling of protective panels and disconnecting plumes
After removing the back cover, the internal Xiaomi Mi 8T device will open to your eyes. Most of the space is occupied by the battery, and in the lower and upper parts there are protective plastic or metal plates that hide the connectors. First of all, you need to unscrew the screws that fix the lower decorative bar, which also presses the main board plume.
First, disconnect the battery from the motherboard. It's the golden rule of any mobile repair. Even if the phone is turned off, the battery contacts are put on voltage, and accidental circuitry can fatally affect the electronics. Use a plastic blade to snap the connector.
Then you have to disconnect the display plume and the touchscreen, and they can be combined into one module or go separately, depending on the modification of the matrix. Carefully tuck the connector locks and pull the plumes aside. Don't pull them sharply so as not to damage the conductive tracks.
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Before you turn off the plumes, take a picture of the location of all the connectors on the phone, which will help you not to confuse anything when you are reassembling, especially if you are doing repairs for the first time.
Now you can remove the top plastic pad that covers the camera and the top of the board, and often hides under it additional screws of the frame mount or antenna contacts, and clear the space around the connectors of dust using a soft brush.
Replacement of the battery and work with adhesive base
The battery in the Xiaomi Mi 8T takes up a significant part of the internal volume and is attached to double-sided tape. It is not possible to pull it out just like that - you need to reheat the back of the case (without the lid already) or inject a special liquid under the battery.
Use plastic cards to swell the battery from different sides, it is strictly forbidden to pierce the battery or bend it, inside is a lithium polymer, which, when in contact with air, instantly ignites, and if the battery is swelled, you need to work with it even more carefully, fixing the edges with tape.
| Parameter | Meaning | Note |
|---|---|---|
| Capacity | 4,000 mAh | Nominal capacity |
| Tension. | 3.85 In | Standard working |
| Type | Li-Po | Immortal |
| Firming | Glue base | It requires heating. |
After removing the old battery, thoroughly clean the new battery bed of the residue of the old glue. Use cotton soaked in alcohol or a special scraper. The surface must be perfectly smooth, otherwise the new battery will lie unevenly, and the back cover may crack when assembled.
On the new battery, stick special strips of double-sided tape (usually complete with a spare part) or apply a thin layer of B-7000 glue around the edges.Let the glue dry a little (2-3 minutes) to a sticky film state before pressing the battery.
Removal and replacement of the display
If your goal was to replace the screen, you need to remove the frame or the heating module completely after the plumes are turned off. In the Xiaomi Mi 8T, the display is often assembled with a frame, which simplifies the process. However, if you change only a glass or matrix without a frame, you will need separation - the complex process of separating glass from the frame using special fluid and string.
To dismantle the framed module, you have to twist all the screws around the perimeter of the inside of the case. Pay attention to the screws of different lengths: twisting a long screw into a short hole can break through the board. Keep a record of the screws on the magnetic mat.
When installing a new display, check the integrity of the sealing gum around the perimeter, it provides minimal protection from dust. Carefully place the plumes in the channels intended for them, so that when the case is closed, they are not clamped.
⚠️ Warning: Don't glue the display to the first health check. Connect the plumes, temporarily press the connectors and turn on the phone. Make sure the touchscreen, the image and the sensors are working.
Device assembly and function verification
The assembly is done in reverse order, but it has its own nuances: first, the battery is installed and connected, then the board is fixed, and then the metal screens are closed, the screws are twisted cross-cross for even pressing.
Pay special attention to the fingerprint scanner plume. Place it exactly in the groove, avoiding any cracks. When you stick the back cover, apply a new layer of glue around the perimeter. Use rubber rings or stationery gums stretched across and along the body to lock the lid while the glue is drying (minimum 30-60 minutes).
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The build quality directly affects the life of the device, a poorly glued cover will lead to dust and moisture, and a compressed plume will cause sensors to break down.
After assembly, turn on the device and conduct a full test: check the vibration, sound in the speaker and through headphones, camera operation, Wi-Fi and mobile Internet. If all functions work properly, the dismantling of the Xiaomi Mi 8T can be considered successfully completed.