Xiaomi’s current Redmi Note series is renowned for its reliability and affordable price, but even the best-performing devices aren’t immune to mechanical damage or internal failure. Self-disassembly may be required to replace a broken screen, a battery that has stopped holding a charge, or to clean the speaker from dust.
Before you start dismantling, you need to be clear that opening the case automatically voids the manufacturer's official warranty. If your device is in warranty service, the best solution is to contact an authorized service center. Otherwise, if you are willing to take responsibility for the integrity of the plumes and the case, you can start preparing the workplace and tools.
It is important to understand that the Redmi Note series (from the Note 7 to newer versions) have similar but not identical designs. The basic principles of disassembly remain the same, but the location of screws and plumes may differ. Careful study of your particular device’s circuitry before work begins will significantly reduce the risk of fatal errors.
Required tools and workplace preparation
You can't do a good job without a specialized toolkit. You can't use stationery knives, pins or kitchen appliances because it's guaranteed to damage the internal components or cause injury. You'll need a professional mobile repair kit that you can buy from specialized stores.
- 🛠️ Precision screwdriver set (PH000, Pentalobe, Torx – necessary for twisting micro-screws of different types.
- 🔥 Thermophen or heating pad - required to soften the glue holding the back cover.
- 🎴 Plastic blades (mediators) and suction cup - for careful separation of the cover without damage to the glass.
- 🧲 Magnetic mat - for sorting screws, so as not to confuse them when assembling.
Special attention should be paid to safety when working with lithium polymer batteries. Any damage to the battery shell by a sharp object or excessive heating can lead to fire. Therefore, all work should be carried out in a well-ventilated room, away from flammable materials.
Organize the space so that nothing interferes with your movements. Light should fall evenly, without glare, so you can see the small details. It is recommended to use a magnifying glass or head-magnifying device if you do not have perfect vision, since the plumes in modern smartphones are very thin and fragile.
☑️ Ready to disassemble
The initial stages of dismantling: cover and protection
The first step is always to turn the device off completely. Don't ignore this rule, as trying to disconnect the plume under voltage can disable the power controller or the backlight. SIM-cards and memory cards, if provided by the design.
The back of Xiaomi smartphones is most often glued around the perimeter. To remove it, you need to heat the edges of the case. Use the thermophen at low temperature or put the phone on the heating pad for 2-3 minutes. The heating temperature should not exceed 80-90 degrees Celsius, so as not to damage the display or polymer elements inside.
After warming up, gently insert the suction cup at the bottom of the back cover and pull up slightly, creating a small gap. Insert a plastic blade into this gap and, as you slid along the perimeter, gradually unstick the lid. Don't try to remove it with a jerk - the glue should soften evenly.
⚠️ Warning: Be extremely careful at the top of the smartphone, which may include a fingerprint scanner plume or an on button that can easily be damaged if the lid is not sloppy.
Removal of the protective panel and disconnection of plumes
When you remove the back cover, you'll see an interior space that's covered by a plastic safety panel, and it's attached to a lot of screws of different sizes, and you'll twist them in sequence, and you'll fold them onto a magnetic mat, marking the installation areas.
When you take the protection off, you'll see the main components: the battery, the motherboard, and the camera module. Before you take any parts off, be sure to disconnect the plug connectors from the motherboard, and do this with a special spatula or nail, gently putting the connector up.
The order of shutdown of the plumes is important, but in most cases Xiaomi uses a standard layout. The first thing to do is to turn off the battery plume to turn off the board. Then the plumes of the display, touchscreen, main and front cameras, and side buttons are disconnected.
Nuances of plumes in Redmi Note
Removal of the battery and replacement of components
The battery in Redmi Note smartphones is usually glued to a frame on double-sided tape. You can't use metal tools to extract it. You can put a plastic card or a spatula on the edge of the battery and slowly, effortlessly, peel it off as you go deep.
If the battery is very tight, you can reheat the back of the device (without the lid already) for 1-2 minutes. This will soften the glue. Never squeeze the battery or puncture it. If the battery is swollen, you need to work with it with great care, fixing its edges so as not to damage the shell.
Replacing other components, such as a charging connector or speaker, is usually easier. They can be attached to screws or pasted into a plastic module. In some models, the charging connector is soldered on a separate board that is connected to the main motherboard with a flexible plume.
| Component | Type of attachment | Difficulty replacing | Risks. |
|---|---|---|---|
| Battery | Adhesive tape | Medium | Fire, bloating. |
| Display module | Glue + screws | Tall. | Breaking glass, plumes |
| Back cover. | Clay. | Low. | Glass cracks |
| Camera. | Screws + plume | Low. | Dust on the matrix |
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When installing a new battery, make sure the connector sits tightly in the connector.Unpressed contact can lead to false charge readings or a sudden turn off of the phone.
Work with the display module and frame
The most difficult and expensive part of repairing is often replacing the display. In modern Redmi Note models, the screen is often glued to the frame, and the replacement is done along with the frame or requires reglazing of the glass. If you change only the module, the old screen needs to be dismantled.
Removing the display requires perimeter heating and careful cutting of the glue with a thin string or blade, and you need to act slowly so as not to damage it. OLED-Any pressure in the center of the screen can cause stains or completely fail.
When installing a new module, make sure the frame is clean. Use a special glue B-7000 or E-8000 for fixation. Apply the glue with a thin layer, let it dry a little (1-2 minutes) before pressing, and then tightly press the screen and lock with rubber rings for 1-2 hours.
⚠️ Warning: Don't use superglue (cyanacrylate) to stick the screen! it highlights the pairs that settle on camera lenses and touchscreens, forming an indissoluble white plaque, and also makes the glass brittle.
Device assembly and initial start
It's built in reverse order, and the battery is installed and connected, then the motherboard, the cameras, and other modules, and only after you plug all the plumes in and check if they're landing can you screw the safety panel.
Twisting the screws without undue effort. Too much puffing can break the thread in plastic bushings or damage the circuit board. Make sure that no screw is left out and they all fall into place.
Before the final sticking of the back cover, it is recommended to start the first one. Connect the display and battery plume, press the switch on. If the phone is turned on, shows the image and reacts to touch, the assembly was successful. If not, double-check all connections.
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Successful assembly depends not so much on the speed, but on the sequence of actions and the quality of connection of each plume.