A broken back is not only an aesthetic problem, but also a serious threat to the inside of your smartphone. Moisture, dust and even small particles can easily penetrate the inside of the case through cracks, causing contact oxidation and the failure of expensive components. Replacing the back cover with a Xiaomi Redmi is a procedure that can be performed on your own if you have minimal skills with the equipment and the right tool.
In this article, we will discuss in detail the process of dismantling the damaged part of the body and installing a new one. You will learn what tools will be required for the work, how to safely warm up the glue and not damage the display or battery. We will look at the nuances for different Redmi series, as the design of models can vary significantly. Careful study of the instructions before starting work will help to avoid typical mistakes of beginners.
Before starting to disassemble, you need to assess the extent of the damage. If the cracks are small, some users prefer to just stick a protective film, but this is a temporary solution. Full replacement ensures that the factory seals (provided you use quality glue) and neat appearance. Next we will move on to the preparation of the workplace and tools.
Tools and workplace preparation required
A good replacement of the back cover is impossible without a specialized tool. Trying to open the body with a knife or a screwdriver with a wide sting is almost guaranteed to damage the frame or cut your fingers. You will need a heat-treating hairdryer that will soften the fixing glue. A regular household hair dryer may not give the desired temperature, so it is better to use a power-adjusting construction hairdryer or a professional heat-layer.
To detach the elements, you will need plastic blades (mediators) and a suction cup. Metal tools are highly undesirable, as they can easily damage the plumes or break the battery. Also prepare tweezers with curved ends for careful extraction of small parts. Remember to use adhesive or special adhesive tape (B-7000, T-7000 or analogues), because the factory layer of glue is disposable.
- 🔧 Set of screwdrivers (cross-haired) PH000 Torx T4/T5) screw.
- 🌡️ Hair dryer or heating platform for softening glue.
- 🧲 Magnetic mat or organizer for screws so as not to lose them.
- 🧼 Degreasing (isopropyl alcohol) and wipes for cleaning frames.
The organization of the workspace is the key to success. Cover the table with a soft cloth so that the screws or parts that fall do not scratch. The light should be bright and directed, so that you can see the small plumes and connectors well. Before you start working, be sure to turn off the smartphone completely.
Design features of different Redmi models
Xiaomi Redmi smartphones come in a variety of form factors, and the approach to disassembling them depends on the material of the rear panel. Budget models often have a plastic non-removable cover that is glued around the perimeter. In such devices, access to the battery and boards opens from the rear. The more expensive models of the Redmi Note Pro series can have glass or ceramic panels that require even more careful handling due to the risk of crunching when heated.
It's important to distinguish between models with built-in batteries and those with conventional removable batteries. In most modern Redmi, the battery is hidden under the back cover and fixed to glue. The design of the case may suggest additional screws under decorative plugs or a logo. Ignoring these screws when you try to remove the lid will cause plastic latches to break.
Some models have a fingerprint scanner integrated directly into the back cover, in which case you will need to transfer the scanner plume to a new part when you replace it, or buy a cover assembled with a module. Be extremely careful with the scanner plume, as it is very thin and easily breaks when you move sloppyly.
| Model | Cover material | Type of attachment | The presence of a scanner in the cover |
|---|---|---|---|
| Redmi 9A / 9C | Plastic. | Glue + latches | No (in the button) |
| Redmi Note 10 Pro | Glass. | Clay (B-7000) | Yeah (button) |
| Redmi Note 11 | Plastic/Glass | Clay. | No (in the button) |
| Redmi 10X 5G | Glass. | Glue + screws | Yeah (under screen) |
Why is glass more dangerous than plastic?
The process of dismantling the damaged cover
Start by removing the tray for SIM-This is a standard procedure that avoids pressure on the body in further manipulation, then turn on the hair dryer and set the temperature around the top of the head. 80-100 Do not hold the dryer too close to the surface so as not to overheat the display matrix, especially if you have a model with a high-speed screen. AMOLED-screen sensitive to high temperatures.
Warm up the perimeter of the back cover evenly for 2-3 minutes. The glue should become soft and viscous. After warming up, attach the suction cup to the bottom of the lid (where there is no camera) and pull up slightly, creating a small gap. Insert a plastic blade or mediator into this gap gently. Do not use force if the lid does not lend itself - it is better to warm it up again.
Drive the blade along the perimeter of the body, cutting the adhesive layer. Move slowly, trying to hold the tool parallel to the plane of the smartphone. Pay special attention to the areas around the camera lenses and flash, there the glue can be applied thicker. If you feel strong resistance, check if any hidden screw is left unscrewed.
☑️ Pre-deletion check
When the lid is disconnected around the perimeter, don't open it sharply like a book. There may be plumes (e.g., from a fingerprint scanner or an NFC antenna) inside. Carefully inspect the interior space. If there are plumes, they should be carefully deactivated by first snapping the connectors with a nail or a plastic blade.
⚠️ Warning: Never pull the plume! Only disconnect the connector. A sharp jig can break the conductive tracks, and the scanner will stop working even on the new lid.
Cleaning of frames and preparation for installation
Once the old lid is removed, the old glue remains on the smartphone frame, and it needs to be removed carefully so that the new panel is flat and securely maintained. Use a plastic spatula and a napkin moistened with isopropyl alcohol. The surface must be cleaned to perfect smoothness, without lumps and villi.
If there are dents on the frame, it is advisable to align them, otherwise the new lid may burst during installation or not stick to the deformation. Check the condition of the side buttons and their plumes - when disassembling them, they are easy to touch. Make sure that the speaker and microphone are not clogged with dust, because when the lid is removed, they are easier to clean.
Wipe the inside of the new lid with alcohol to degrease the surface for the adhesive. Notice the holes under the camera and the flash - they should match exactly with the modules on the board. If you use liquid adhesive (B-7000), apply it in a thin continuous strip around the perimeter.
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Use a toothpick to apply glue to hard-to-reach corners of the frame to ensure a uniform layer without bubbles.
Don't apply too much glue, otherwise excess glue can leak out when pressed and stain the body or get inside the smartphone.A thin layer is usually enough for a reliable fixation.Let the glue dry a little (1-2 minutes), if specified in the instructions to a specific composition, before joining the parts.
Installation of a new cover and fixation
Carefully combine the new back cover with the smartphone body. Start at the top of the camera and gradually lower the lid down. Make sure all the holes match and no plumes are clamped. After aligning, press the lid tightly around the perimeter with your fingers.
For uniform pressure distribution and reliable fixation, it is recommended to use stationery gums or special clips. Wrap your smartphone 3-4 bands across and leave to dry for 1-2 hours. Full polymerization of the glue can take up to 24 hours, so on the first day do not expose the device to loads.
- 👐 Press the edges of the lid with your fingers tightly on 30-60 seconds.
- 🔗 Check all buttons and ports until the glue is completely dry.
- ⏳ Leave the device under the press (rubbers) for at least 1 hour.
- 🧹 Immediately remove the excess glue with a dry wipe.
If you've changed the lid with the built-in scanner, be sure to check the unlock work immediately after assembly until the glue is completely dry.In some cases, the scanner may need to be calibrated through an engineering menu, but most often it works immediately.
⚠️ Warning: Do not turn on your smartphone immediately after installation if you have used aggressive chemical cleaners.Let the vapors completely weather out so that moisture does not get on the board.
Frequent errors and precautions
One of the most common mistakes is not heating up the glue enough: users start picking a cold case with a shovel, breaking plastic latches or breaking glass. The other extreme is overheating, which can damage the adhesive layer of the display (a yellow spot will appear) or blow up the battery.
Ignoring battery shutdown is a critical mistake. Even if you only change the back cover, there is a risk of hitting the plume of the display or other components with a metal tool. Short circuit can cause the power controller to fail. Always try to turn off the battery plume first thing after opening access.
Using the wrong adhesive, like superglue (cyanacrylate), is a fatal mistake: it dries too fast, becomes brittle, and its vapors settle on the camera lenses and display glass, forming a white plaque that is almost impossible to remove. Use only special adhesives for electronics.
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The secret to success is patience. Don't rush to tear the lid off, it's better to warm up longer than to damage the body by force.
Also worth mentioning is the risk of damage to the main camera plume: In many Redmi models, the camera is glued to the back cover or pressed very tightly, and if you take it off, you can tear the camera module off the board or damage its stabilizer.