Modern smartphones are becoming more difficult to maintain, and the Xiaomi Redmi Note 8 Pro is no exception.This model, which has become a real hit with sales, has a glass rear panel, which greatly complicates the process of accessing internal components compared to devices with a plastic back. If you are faced with the need to replace a broken screen, exhausted battery or just want to clean the speaker from dust, you will have to carefully open the airtight case.
Before any manipulation, it is important to understand that disassembling a device always involves the risk of damage to external elements, especially glass. Factory assembly involves the use of large amounts of glue to ensure the monolithic structure and protect against moisture.
In this article, we will take a detailed look at each stage of dismantling, with a focus on safety and proper handling of adhesives, how to warm up the case, what screwdrivers you will need to unscrew the screws, and how to safely disable the plumes so as not to damage the motherboard.
Tools and workplace preparation required
You can't really disassemble a smartphone without a specialized set of tools. Trying to open the case with a knife or a credit card will at best cause deep scratches on the frame, and at worst damage to the battery or display. You'll need a dryer to warm up the glue, a suction cup to pull the glass and a set of precision screwdrivers.
Special attention should be paid to the organization of the workspace. The surface should be clean, flat and well lit. Small screws have the property of flying around the table and falling on the floor, so the presence of a magnetic mat or several containers for sorting fasteners is simply necessary. It is also recommended to use an antistatic bracelet, although for amateur repairs it is enough just to touch a grounded metal object before starting work.
To successfully complete the task, prepare the following list of equipment:
- 🔥 Fryer or thermophene (heating temperature near the temperature of the 80-90°C)
- 🧲 Glass lifting suction cup and mediators (plastic blades)
- 🔧 Set of screwdrivers (cross-haired) P2/P5 flat)
- 🧴 Isopropyl alcohol or special liquid B-7000 glue-removal
⚠️ Warning: Never use an open fire (gas burner, lighter) to heat the back cover. Local overheating can cause the lithium polymer battery directly under the glass to blister or ignite.
If you plan to replace a display or battery, make sure you have a spare adhesive frame or tube of glue on hand for later assembly. Lack of sealing will cause dust and moisture to continually enter the case, reducing the life of the electronics.
Safe heating and removal of the back cover
The most critical step is to separate the glass panel from the metal frame. The glue that it's glued to hardens over time, so heat treatment is mandatory. Put the phone face down on a soft cloth or silicone mat so you don't scratch the screen. Turn on the hair dryer at medium power and warm up the perimeter of the device evenly.
Do not hold the flow of hot air at one point for more than 3-4 seconds. Move the hair dryer in circular motions around the perimeter for 2-3 minutes. The glass should become hot, but not hot - check the temperature with your hand, it should be barely tolerant to touch. After heating, try gently pulling the suction cup up, creating a slight tension.
Once you have a microscopic gap, insert a thin plastic mediator or a special spatula. Do not use metal tools at this stage, as they can break the glass under pressure. Drive the blade along the perimeter, gradually cutting the adhesive layer. The movements should be smooth, without jerking or excessive effort.
What to do if the lid is not removed?
Once you've walked around the perimeter, the back cover should be easy to separate. If you feel resistance, don't pull, you'd better repeat the heating procedure. Remember, the Redmi Note 8 Pro has a pretty fragile glass at the back, and rushing is not acceptable.
Dismantling the protective panel and disconnecting the plumes
Once the glass cap is removed, you will see the interior of the smartphone, which is covered by a black plastic cover that protects the motherboard and battery from mechanical stress, and you have to unscrew all the locking screws to access the main components.
Look carefully at the perimeter of the lower body, you'll find several screws of different sizes, and it's important to remember or map each screw's location, because they can vary in length, and twisting a long screw into a short hole can cause the motherboard to break down and the device to fail.
When you unscrew all the screws, gently lift the plastic panel. Underneath it, you'll see the main plume of the display that's connected to the top of the board. Before you remove any part, be sure to turn off the battery! This is the first and foremost rule of mobile repair to prevent short circuits.
- 🔋 Disconnect the battery connector with a plastic blade
- 📱 Carefully click the main display plume
- 🔌 Turn off the auxiliary buttons and speakers plume
Now that the power is off, you can safely work with other components, and if your goal was to replace the battery, you can remove the old battery by pulling on special tongues (if any) or gently putting the cell on the bottom. Be careful: damage to the battery shell can lead to its ignition.
☑️ Check before charge is withdrawn
Replacement of the battery and work with the glue layer
In the Redmi Note 8 Pro, the battery is glued to the bottom of the body with double-sided tape. Over time, the glue loses its properties, but often the battery is held tight enough. Do not try to tamper with a metal screwdriver or knife under any circumstances - a puncture of the cell is guaranteed to lead to a chemical reaction and smoke.
The best way to extract it is to use a thin line or a special string, and you can squeeze it under the battery on the top edge and cut the adhesive layer with sawing movements, and if the battery is very tight, you can warm the bottom of the body slightly with a hairdryer, but very carefully so that the battery itself does not overheat.
Once the old element is removed, you need to thoroughly clean the seat of the residue of the old glue. Use isopropyl alcohol and a plastic card. The surface should be perfectly clean and fat-free before installing the new battery. Use special adhesive strips or high-quality glue B-7000 to fix it.
| Parameter | Old battery | New battery |
|---|---|---|
| Capacity | 4500mAh (nominal) | 4500mAh (original) |
| Tension. | 3.85V - 4.4V | 3.85V - 4.4V |
| The state of the glue | Residues, require cleaning | New stripes or gels |
| Time to work. | Reduced (wear and tear) | Full cycle (100%) |
⚠️ Warning: If the battery starts to smoke or gets very hot during the recovery process, immediately stop working, take the device out to an open space and place it in a sand container or fire-resistant container.
Install the new battery in reverse order. Make sure the connector sits tightly in the connector and is fixed with a clamping bar. After connecting the battery, do not rush to close the case - first check the health of the device by connecting the display plume and turning on the smartphone.
Difficulties in replacing the display and camera module
Replacing the screen with the Xiaomi Redmi Note 8 Pro often requires a complete disassembly of the device, as the display module can be glued to the frame or held on screws under the protective panel. In some versions, the screen changes with the frame, which simplifies the process, but requires relocating all internal components from the old housing to the new one.
If you only change the display glass, be prepared to dismantle the main board, which is mounted with multiple screws and plume holders, and when removing the board, be careful about the main camera plume, which often passes under the board or is attached to it on the side.
The main camera in this model is quite large and protrudes from the body. When disassembling, it often becomes necessary to remove it, too, to access the bottom screws or plumes. The camera is fixed by a screw and connector, which requires careful handling - the contacts are very delicate.
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When installing a new display, be sure to check the touchscreen until final assembly and gluing. After applying the glue, it will be impossible to correct the error.
The assembly is done in a strictly reverse order, make sure that all the plumes are properly stacked in their channels and are not clamped with metal elements, any extra pressure on the plume can lead to stripes on the screen or sensor failure after a while.
Shell assembly and leakproofness check
The final step is to get the device back to its original state, and before you put the back cover in, you have to remove all the old glue from the frame, use alcohol and wipes to get a smooth surface, and if you leave the bumps, the lid will get crooked, and the gaps will get filled with dust.
Apply a new layer of glue or install a factory adhesive frame. Spread the adhesive evenly around the perimeter, avoiding the compound hitting the cameras and sensors. Put the back cover tightly around the perimeter. You can use stationery gums to tighten the body for 15-20 minutes to make it more secure.
After assembly, be sure to check the functionality of all nodes:
- 📶 Cellular and Wi-Fi (antennas may have been displaced)
- 🔊 Speaker and microphone sound
- 📸 Camera focus and flash operation
- 🔋 Charging the device and operation of the proximity sensor
If all functions are working correctly, the repairs are successful, the body must be monolithic, without creaks and backlashes, and the gaps between the glass and the frame must be minimal and uniform throughout the perimeter.
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Quality cleaning of old adhesive joints is the guarantee that the new cover will lie flat and the device will look like new.