Removing the back cover of the Xiaomi Redmi 9T is a challenge that owners face when replacing the battery, repairing plumes or cleaning dust. Despite its apparent simplicity, the procedure requires caution: improper actions can lead to cracks in the case, damage to flexible plumes or even failure of the power button. In this article, we will discuss three proven methods of disassembly, discuss the necessary tools and typical errors, and give recommendations for maintaining leakage after assembly.
The Redmi 9T (codenamed lime) is a low-end model, but it has a design that is slapped on latches and adhesives, and the battery is glued to the body, which means that it will take not only a plastic blade to open safely, but also patience. If you've never taken your smartphone apart before, you should first read the video instructions at the end of the article, which will help visualize the process.
Preparation for the review: tools and security measures
Before you start removing the lid, make sure you have everything you need. The absence of even one tool can lead to irreversible damage - for example, using a metal screwdriver instead of a plastic shoulder blade often causes scratches on the frame or a fingerprint scanner plume to rupture.
- 🔧 A set of plastic blades (preferably with curved ends for comfortable tweaking) is suitable for repairing phones with a blade thickness of 0.1-0.3 mm.
- 🔥 A hair dryer or a thermo-air station (at least 1000 watts) to soften the glue, alternatively iOpener (a bag of gel heated in a microwave).
- 🧲 Suction cups (3-5 cm in diameter) for initial detachment of the lid. Important: suction cups should be new, as old ones lose vacuum.
- 📦 Container for screws (or magnetic mat) - in Redmi 9T 12 screws of different sizes are used, they are easy to confuse.
- 🧴 Isopropyl alcohol 90%+ Removing glue residues and cleaning contacts.
Also, prepare the workspace: the table should be clean, without crumbs and dust, and put a soft substrate on it (for example, a silicone mat or a folded towel) so that the screen does not scratch. If you work with a hair dryer, keep it 10-15 cm away from the body and don’t direct hot air to the screen or camera – this can damage your body. OLED-matrix.
⚠️ Warning: Do not use a knife or metal objects to lash the lid! Even a small pressure can lead to a crack in the area of the antenna lines (they are located around the perimeter of the body and visually resemble thin metal strips.
Method 1: Warming and removing the lid with a suction cup
This is a way for people who are taking apart the Redmi 9T for the first time, and it's minimally traumatic to the body, but it requires care, and the basic principle is to heat the adhesive layer evenly so that the latches are released without resistance.
- Turn off the phone and remove it. SIM-Make sure the battery is at least 30% charged, which will prevent a sudden shutdown when it is possible to turn on during disassembly.
- Warm up the back cover with a hair dryer for 2-3 minutes, holding it at a distance of 10-15 cm The temperature should be 60-70 ° C (not higher!). You can check the readiness by slightly pressing the lid - it should play a little.
- Attach the suction cup to the bottom of the case (near the USB-C connector) and pull up. If the lid doesn't lend itself, don't put too much effort into it -- you better warm up the edges again.
- Once you have a gap, insert a plastic blade into it and gently guide along the body, disconnecting the latches. Start at the bottom edge and move counterclockwise.
Pay special attention to the top of the case, where the camera plumes and the fingerprint scanner are located. If the lid doesn't move, don't try to pull it off by force, because the glue probably won't warm up enough. Reheat for another 1-2 minutes.
Check the battery charge (minimum 30%) |
Delete SIM-card|
Prepare all instruments |
Warm up the case to 60-70°C|
Start at the bottom edge (near the bottom edge) USB-C)-->
Method 2: Disassembly without suction cup (for experienced)
If you don't have a suction cup or the glue is too strong, you can do with plastic blades, which requires more skill, but is suitable for re-examination (for example, after replacing the battery).
Algorithm of action:
- Warm the body with a hair dryer, as described above.
- Put a plastic blade in the gap between the lid and the frame near the volume button. Press carefully until you hear a slight click, which means that the first latch is released.
- Without removing the shoulder blade, you should take it along the side of the blade, alternately snapping the mounts. Move slowly so you don't miss any latches.
- Once the side is clear, move the shoulder blade to the top of the body, and be careful, because the plumes are there, and they're easily damaged.
If the lid starts to bounce back, it means that the glue is not softened enough. Don't continue, you better repeat the heating. In extreme cases, you can use a thin guitar mediator (0.38-0.46 mm) instead of a shoulder blade, but it is less convenient.
⚠️ Attention: At Redmi 9T The fingerprint scanner plume is glued to the lid, and if you pull it up, it can come off the board, and you can unplug the lid smoothly with your finger on it.
Plastic blades |
Suctions |
Mediators |
Fryer-dryer + shoulder blades |
Another option-->
Method 3: Disassembly with a special glue (for professionals)
This is a method used in service centers and is suitable if you plan to repeatedly disassemble the phone (for example, for testing components), instead of using standard glue, you use a B-7000 or similar thermal glue that allows you to remove the lid without heating.
Procedure:
- Apply a thin layer of B-7000 glue around the perimeter of the lid (without touching the camera and connectors!).
- Press the lid and let the glue dry for 10-15 minutes.
- Carefully tuck the lid with a spatula - the glue will allow it to separate without heating.
The advantage of this method is that the lid is removed without the risk of damage to the plumes, and the adhesive can be reused, but for a one-time disassembly, this method is unnecessarily difficult.
What to do if the cover is broken when removed?
Common Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when parsing the Redmi 9T. Here are the most common of them and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Use of metal tools | Scratches on the frame, damage to antenna lines | Use only plastic or nylon blades |
| Excessive heat by a hairdryer | Deformation of plastic, detachment of the screen module | Keep the hair dryer at a distance of 10-15 cm, do not heat for more than 3 minutes |
| A sharp lid-break | Breaking the plume of the fingerprint scanner or camera | Disconnect the cover slowly, holding the plumes |
| Incorrect assembly (unfixed latches) | The cover goes away when pressed, dust gets inside | Check all latches before final fixation |
Another common problem is damage to the sealing gum around the camera, which is responsible for dust protection (in Redmi 9T, IP53 protection level). If the gum breaks, it can be replaced with a similar one from other Xiaomi models (for example, from Redmi Note 9), but it is better to order the original one (article: XM00123).
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If the phone is getting worse at catching the network after disassembly, check the integrity of the antenna lines on the lid. These can be restored with conductive glue (for example, Permatex).
What to do after removing the cover: further actions
When the lid is successfully removed, the Redmi 9T’s interior design will open up in front of you.
- 🔋 Battery replacement: the model uses a battery BL50 To remove it, you will need to disconnect the connector and carefully tuck the battery with a plastic card, preheating the glue.
- 📸 Camera cleaning: dust on the module can be removed with a soft brush or a spray of compressed air!
- 🔌 Check the connectors: if the phone is not charged, check USB-C - oxidize the contacts.
- 🛠️ Replacement of speaker or microphone: in Redmi 9T The lower speaker and microphone are located on the same module (article: XM00456).
If your goal is to replace the display, consider that this model has a bezel-glued screen, and you'll need a special machine to remove the displays (or heat it to 80-90°C with a thin string), and without experience, you'd better trust the service center to do this.
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After any repair, be sure to check the tightness of the body. To do this, turn on the phone and hold it to the speaker - if you hear a whistling when you breathe, then the seal is broken.
Video instructions and additional resources
For a better understanding of the process, we recommend you to read the video analysis, below are verified sources with detailed instructions:
- 🎥 Redmi's disassembly 9T from the channel "FixIt" (step-by-step analysis with comments in Russian).
- 🎥 Replacement of the battery with Redmi 9T (Detailed explanation of the battery removal process).
- 📄 Forum MIUI SU — Theme with user photo reports and repair tips.
If you are looking for original parts, look for the following items:
- Back cover (black): MB00329
- Battery BL50: XM00567
- Charging/dynamics plume: XM00456
- Main camera (48 MP): XM00789
Buy parts only from trusted vendors (e.g. AliExpress in official Xiaomi stores or certified suppliers) Counterfeit products are often of lower quality and can fail in a few months.