How to open Xiaomi Redmi 8: full disassembly instructions

Modern smartphones Xiaomi series Redmi are famous for their reliability and affordable cost, but over time, even the most enduring devices require maintenance. Most often users are faced with the need to replace the failed battery, broken glass display or clean the speaker from dust. Model Redmi 8 is no exception and requires a careful approach to dismantling, since the design of the case has its own features that distinguish it from its predecessors.

The process of opening the case is a delicate operation that requires not only a special tool, but also an understanding of the internal architecture of the gadget. Wrong actions can lead to damage to the plumes, cracks in the back panel or, worse, to a puncture of the lithium polymer battery. In this article, we will discuss in detail how to safely open the Xiaomi Redmi 8, what tools you will need and what nuances you should pay special attention to so as not to turn a minor repair into a purchase of a new device.

Before you start physically affecting the body, you need to make sure you understand the sequence of actions clearly. Hurry is the main enemy here, because the adhesive base that holds the back cover takes time to soften. We'll look at every step from the preparation of the workplace to the final assembly, so that you can get the job done efficiently and without unnecessary nerves.

⚠️ Warning: Before starting any work, be sure to completely turn off the smartphone. Attempting to turn off the display or battery plumes when the device is on can lead to a short circuit and failure of the power controller.

Tools and workplace preparation required

To disassemble the Redmi 8, you will need a minimal but specific set of tools that can be purchased from any radio parts store or online. Use of inappropriate items such as knives or pins is strongly discouraged, as they can damage internal components or scratch the frame.

• 🔧 Sets of screwdrivers: You will need a cross screwdriver PH00 or PH000 for twisting the screws of the motherboard and protective screens.
• 🌡️ Thermophen or heating pad: Necessary for uniform heating of the perimeter of the back cover to soften the factory glue.
• 💳 Plastic mediators: Thin plastic cards or special blades to snap the case without damaging the plastic.
• 🧲 Magnetic mat: will help not to lose small screws and remember their location when Assembly.

Organize the workspace so that it is well lit. Small parts, such as the screws of the mounting of the underscreen speaker, are easy to lose on the table. It is recommended to use a white surface on which all the elements are clearly visible. Also prepare a screw folding container, since Xiaomi often uses fasteners of different lengths, and it is extremely easy to confuse them when building.

Pay special attention to safety when working with heating appliances. If you use a building hair dryer, do not hold it too close to the body for a long time, so as not to overheat the battery or deform plastic frame elements. The optimal heating temperature of the back cover is about 80-90 degrees Celsius.

💡

Use the suction cup together with the mediator: lift the edge of the lid with the suction cup after heating and insert the plastic card into the resulting gap to hold it.

Removing the Redmi 8 back cover

The first step in disassembling is to dismantle the back panel. Unlike the old models, where the lid was just snapped on clips, the Redmi 8 is planted on a fairly strong layer of glue around the perimeter, which is done to improve ergonomics and prevent the creaking of the body, but complicates the opening process.

Start by removing the tray for SIM-This is a must, because the pressure inside the case when heated can damage the cards if they stay inside. Then turn on the heater and evenly warm the edges of the device, paying special attention to the corners and areas around the camera.

Once the plastic is warm to the touch (but not hot), gently insert the mediator into the junction between the frame and the back cover. It is best to start at the bottom of the case or on the side face where there are no volume keys. Move the tool along the perimeter, gradually cutting the adhesive layer.

• 🔍 Control the depth: Do not enter the mediator deeper 2-3 mm, so as not to touch the fingerprint scanner plume or the side button plumes.
• 💨 Work slowly: Sharp movements can cause a crack in the back panel, which in Redmi 8 is made of polycarbonate.
• 🔄 Reheating: If the glue has hardened again and the movement has become tight, stop pulling and warm up the problem area again.

When all the clips are snapped and the glue is softened, gently lift the back cover. In the Redmi 8, the fingerprint scanner is integrated into the back cover and connected to the motherboard with a plume. This is a critical point: you can't rip the lid off dramatically like in old phones. You need to turn off the scanner plume first, or you need to bend the lid very carefully, gaining access to the insides.

Dismantling protective screens and disconnecting plumes

When you take the back cover off, you'll see the inside of the smartphone, and most of the space is occupied by the battery, but the top and bottom are important components, covered with black plastic or metal slats, and these slats are fixed by screws that need to be twisted out.

First of all, you have to turn off the battery. It's the golden rule of any electronics repair. Find the battery connector (usually located on the top of the battery, next to the motherboard) and gently disconnect it, putting a plastic tool on it, and only after it's turned off, you can continue working with other components.

Next, remove the protective bar covering the display and touchscreen connectors. In Redmi 8, it can be combined and also close the main camera module. Unscrew all the visible screws, remember their length and location, and remove the plastic.

Now you can turn off the plumes of the display. They're fixed in the connectors pretty tightly. Use a plastic blade to lift the connector up. Don't pull the plume itself, just the hard part of the connector. Once all the cables are turned off, you can start to further dismantle the nodes.

Replacement of the battery and work with the glue layer

The most common reason Redmi 8 disassembly is a battery replacement, and the battery in this model is glued to the frame with double-sided tape, which eventually loses its properties or, conversely, "stuck" dead, and you can't use metal objects to remove the old battery.

The recommended method is to use a thin line or a special string, and you can use a line to push the edge of the battery and use left-right (sawing) movements to cut off the adhesive layer, so you can get the battery out without deforming it, and deformation of the lithium polymer battery is dangerous by fire or bloating.

After removing the old power supply, carefully clean the seat of the residue of the old glue. Use isopropyl alcohol or a special solvent for the adhesive (for example, B-7000), but apply the liquid carefully so that it does not fall on the display from the back side.

• 🧹 Clean: Remove all bumps so that the new battery fits perfectly.
• 🆕 New glue: Apply special adhesive strips (usually included) or a thin layer of glue to the new battery B-7000.
• ⏳ Fixing: Press the battery and let the glue grab for a while 10-15 minutes before assembly.

⚠️ Warning: Never pierce the battery case or try to bend it to get it in, which will cause an irreversible chemical reaction inside the battery.

💡

Using a fishing line to extract the battery is the safest method, minimizing the risk of damage to the case and the battery itself compared to using screwdrivers.

Removal of display and touch screen

Replacing the display with the Xiaomi Redmi 8 is a more complex process, since the screen here is a modular design, but glued to the frame. If your goal is to replace only the glass (touchscreen) without changing the matrix, it requires a separator and experience, at home it is better to change the module assembly.

To remove the display module after the plumes are turned off, you need to unscrew the screws that hold the frame if you plan to glue the module to a new frame. Redmi 8 often sells the display already on the frame, which makes it easier: you only need to move the motherboard and battery to a new frame.

Heat is also used to remove the display if it is glued directly, but in this model, the design involves screws attached to the perimeter under a decorative frame or directly to the plastic middle frame. Be careful with the pressure on the matrix, which is very fragile.

When you install a new display, check it to full assembly. Connect the plumes, turn on the phone and check:

• 🖼️ Image: Absence of spots, stripes and broken pixels.
• 👆 Touch: Does the screen respond to touches across the area.
• 💡 Brightness: Does autobrightness and adjustment work.

Assembly of the device and verification of functionality

The Redmi 8 is assembled in reverse disassembly order. This seems obvious, but requires care. Make sure all plumes are inserted before clicking and are fixed with clamping slats. An unpressed connector is a common cause of a broken microphone or sensor after assembly.

Write the screws evenly, without putting too much effort to avoid breaking the thread in the plastic pillars of the case. Pay special attention to the screws around the charging connectors and headphones, as there are often long fasteners.

Before you stick the back cover, take a final test of all the features: take a photo, check the sound in the speaker and headphones, make sure that Wi-Fi and Bluetooth work. If everything works, apply a new glue (B-7000 or special adhesive for phones) around the perimeter of the back cover.

Press the lid and lock the smartphone with rubber bands or loads for 30-60 minutes to polymerize the glue. Don't turn the phone on immediately if you use liquid glue, let it dry so that the alcohol vapor evaporates and does not settle on the camera optics.