Disassembling Xiaomi’s smartphone is a challenge that owners face when replacing a battery, repairing a camera or cleaning from dust. But opening the lid incorrectly can lead to cracks in the case, damage to plumes or even loss of leakage (relevant to IP53 models). This article provides step-by-step instructions for different Xiaomi series, a list of necessary tools and critical nuances that are not covered in the standard guides.
Many users mistakenly think that it is enough to cover with a knife or credit card. In practice, this only works for older models like the Redmi 4A or Mi A1. Modern smartphones (for example, Xiaomi 13 Ultra or POCO F5) have adhesive joint and hidden latches, and some even ultrasonic welding (as in Mix Fold 3).
Important: If your phone is warranty, self-disassembly will cancel it. For models with official support (for example, Xiaomi 14 Pro), it is better to contact the service center. This instruction is intended for self-repair or when the warranty has expired.
1.Preparation: security tools and measures
Before you open the lid, make sure you have everything you need. The minimum set of tools includes:
- 🔧 Plastic mediator (or guitar mediator) – for separation of the body without scratches.
- 🧲 Suction cup (diameter 4-6 cm) - helps to lift the cover after heating.
- 🔥 Hair dryer or thermo-air station - for softening the glue (temperature not higher than 60-70)°C).
- 📦 Screwdriver. T3/T4/T5 — for the purpose of spinning (in some models used) Y00 pentalobe).
- 🧴 Isopropyl alcohol (90%+) — glue-residue.
Also, prepare your workspace: a table with good lighting, an antistatic mat (if any) and a screw container (so you don't lose it). Don't use metal tools to lick the lid - they leave microcracks that eventually lead to the hull creaking.
⚠️ Note: If your Xiaomi has a glass back panel (such as the Mi 11 Lite or Civi 3), the heater should be uniform. Local overheating of one section can lead to glass cracking.
☑️ Checklist before review
2. How to determine the type of mounting of the cover in your model
The way the case is opened depends on the design of the case, and the table below shows the features of the popular Xiaomi series (relevant to the 2020-2026 models):
| Series/model | Type of attachment | Features | Difficulty of analysis (1–5) |
|---|---|---|---|
| Redmi Note 10–13, POCO X3–X5 | Glue + latches | Easy access, but lots of glue around the perimeter. | 2 |
| Xiaomi 12/13/14, Mi 11 | Glue + ultrasonic welding (in some) | Heat and neat smearing are required. | 4 |
| POCO F3–F5, Redmi K50–K60 | Glue + metal frame | Screws under the cover, risk of damaging antenna lines | 3 |
| Mix Fold 2/3, Mix 4 | Complex latch system + glue | Professional instrument is recommended | 5 |
| Redmi 9A/10A, POCO M3 | Latches without glue | You can open it without heating, but fragile plastic | 1 |
If your model is not in the table, check it on the iFixit website - there are detailed guides with photos of the insides. For example, Xiaomi 13T Pro will need a special tool to detach the adhesive layer, since the manufacturer uses two-component adhesive.
What is ultrasonic welding in Xiaomi?
3. Step-by-step instruction: method with heating and sucker
This method is suitable for 90% of modern Xiaomi models (except foldable and some flagships).
- Turn off your phone and wait until it cools (if you were in use).
- Heat the hair dryer back cover around the perimeter for 2-3 minutes, keeping it at a distance of 5-7 cm Temperature - not higher than 70 ° C (check with your hand: it should be hot, but tolerant).
- Stick the suction cup closer to the bottom edge (where the speakers are usually located) and pull up. If the lid doesn't lend itself, repeat heating.
- Put the mediator in the gap and carefully guide it along the body, separating the glue. Don't push too hard - there may be plumes inside!
- Separate the lid completely and put it aside (preferably on a soft surface).
⚠️ Warning: If the lid fails to warm up, do not increase the temperature, it can melt plastic latches or damage the battery. Instead, try repeating the heating on the other side or use a thin guitar string (0.1-0.2 mm) to cut the glue.
💡
For models with a glass back panel (for example, Xiaomi 12S Ultra) before heating, stick paint tape on the glass. This will prevent the appearance of microcracks when the suction cup slips.
4. Alternative methods for complex cases
If the standard method didn’t work, try one of these options:
- 🔹 Guitar string method: Suitable for models with very strong adhesive (e.g., guitar string, POCO F4 GT). The string is passed between the body and the lid and the sawn glue is like oil, and the minus is a high risk of damaging the plumes if you don't have experience.
- 🔹 Use of a special solvent glue (e.g, B-7000 It's applied around the perimeter, and in 5-10 minutes, the glue is softened. Plus: it doesn't require heating. Minus: it can damage rubber seals.
- 🔹 Professional parsing kit (e.g. iFixit Pro Tech Toolkit) includes plastic blades of varying stiffness and a suction cup with a lever. Suitable for Mix Fold 3 or Xiaomi 14.
For aluminum-body models like the Xiaomi 12 Pro, cooling sometimes helps, so you put the lid in the freezer for 10 to 15 minutes, and the glue becomes brittle and easier to separate, but it's risky, because when temperatures drop dramatically, the moisture inside the phone can condense.
💡
If you're disassembling Xiaomi's waterproofing (IP53/IP68), after opening the lid, be sure to replace the rubber seal and apply a new glue. Without it, the phone will lose its moisture protection!
5. Common Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes that lead to permanent damage.
- 🚫 Using a knife or screwdriver instead of a mediator, the metal scratches the body and can puncture the battery (risk of fire!).
- 🚫 Dryer overheating above 80°C. This deforms the plastic and damages the screen (in models with the OLED-display).
- 🚫 The lid is jerked, and in the Xiaomi 13 Pro and similar print scanner plume is glued to the lid, and it's easy to pull off.
- 🚫 Ignoring screws under the lid. POCO F5 redmi K60 There are screws under the lid that hold the metal frame, and if you don't unscrew them, the body won't fully understand.
⚠️ Warning: If you see a bloated battery after opening the lid, don't continue to disassemble it! The battery can ignite at the slightest pressure:
- Close the lid carefully (if possible).
- Place the phone in a non-combustible container (such as a metal box).
- Contact the service center for an emergency replacement.
How do I know if the battery is blown?
6 What to do after successful opening of the lid
When the cover is finally removed, follow these guidelines:
- 📸 Take a picture of the plumes and screws before you disconnect them, which will make it easier to reverse assemble.
- 🧹 Clean your insides of dust with a soft brush or a spray of compressed air!
- 🔋 Check the battery for swelling or corrosion. If there is damage, replace it before the phone turns on.
- 🔧 Put the new glue on the lid before you reassemble. B-7000 double-sided 3M 9448A.
If you have replaced a component (such as a camera or speaker), test it before assembly. To do this, temporarily plug in the plumes and turn on the phone (without closing the lid), for example, to check the camera, run the Camera app and take a test shot.
💡
When reverse assembly Xiaomi with water protection (IP53/IP68) Use ultraviolet glue (for example, LOCTITE 3341). It's polymerized under UV-lamp and ensures tightness.