Disassembly of the Xiaomi smartphone: detailed instructions for beginners and experienced users

Xiaomi smartphones are known for their maintainability, but improper disassembly can cause plumes to break, flexible cables to break, or even the motherboard to fail.This article will help you avoid typical errors and conduct the procedure as carefully as possible - whether it is replacing the battery, cleaning from dust or diagnosing malfunctions.

We’ll look at the universal methods that are suitable for most Redmi, POCO and Mi/Xiaomi flagship series (Redmi Note 4X to Xiaomi 14 Ultra) with a focus on tools, sequences and critical moments where most users make mistakes. If you’ve never taken a smartphone apart, start by watching video instructions for your model to visually assess the complexity of the process.

Important: disassembling the smartphone automatically voids the Xiaomi warranty if it is still valid. Even a careful opening of the case leaves traces on the factory seals (for example, on screws under the lid).

1.Preparation: tools and safety

Without the right tools, it's almost impossible to disassemble Xiaomi -- plastic latches break when you try to stab them, and screws with Tri-wing or Pentalobe protection can't be unscrewed with a regular screwdriver. Here's the minimum set you'll need:

• 🔧 Screwdrivers: cross (PH00, PH0), flat (1.5 mm), Tri-wing Y0.6 (for some models), Pentalobe P2 (for iPhone-like screws in older Mis).
• 📱 Plastic mediators/suction cups: to separate the back cover (e.g., iFixit kit or analogues). Metal tools scratch the body!
• 🔋 Tweezers with curved ends for working with small plumes and connectors.
• 🧲 Magnetic mat or screw container: to avoid losing parts (in Xiaomi 11T Pro, for example, 15+ screws of different lengths).
• 🔥 Dryer or thermal air station: for softening of adhesive (relevant for models with adhesive battery fixation, for example, POCO F5).

Additionally, you may need isopropyl alcohol (90%+) to clean the contacts, bilateral tape (for example, 3M 9448A) to lock the battery after replacement, and a multimeter to check the voltage on the board. If you plan to solder, prepare a soldering station with a thin sting and flux RMA-223.

⚠️ Warning: Don't use superglue to fix parts! It conducts current and can close contacts on the board. Also avoid metal tools when working with the battery - puncture or deformation can cause fire.

Removal of the back cover: technique and nuances

Xiaomi's back cover is mounted on latches and/or glue. IP-certified models (e.g., Xiaomi 13 Pro with IP68) use a sealant to make disassembly more difficult.

1. Turn off your smartphone and remove the SIM- card/memory card (if any).
2. Heat the body with a hair dryer (60-80°C) around the perimeter for 2-3 minutes. This will soften the glue. Don't overheat - the plastic can deform!
3. Hold the suction cup on top of the lid (near the camera) and pull upwards, while simultaneously lifting the lid with a plastic mediator as you move around the perimeter.
4. Be careful in areas with flexible plumes (such as near the power button or Type-C connector).

In the POCO M3 and Redmi 9A models, the lid is relatively easy to remove, and in the Xiaomi 12S Ultra or Mix Fold 2 models, you will need patience - there are additional screws under decorative plugs. If the lid does not lend itself, check:

• 🔍 Are there any undetected screws (sometimes hidden under stickers) left?
• 🔥 Whether the glue warms up enough (try to heat for another 1-2 minutes).
• 🛠️ Are you using a mediator that is too thick (optimally 0.15–0.2 mm).

3. Battery Removal: Risks and Rules

The battery in Xiaomi is one of the most vulnerable components, and improperly removed can cause fire, bloating, or damage to the motherboard.

• 🔋 Make sure the smartphone is off and not connected to charging.
• 🧊 If the battery is swelling, don't try to puncture it! It can cause a chemical reaction. You'd better call the service.
• 🔧 Prepare a plastic spatula or a special battery tool (e.g., iFixit Battery Removal Tool).

Recovery process:

1. Unplug the protective film (if any) from the battery, which is usually hidden under the connector, which must be detached with a flat screwdriver.
2. If the battery is glued, slap it on the edge with a plastic blade and slowly pull it up. When resisting, heat the area with a hair dryer (maximum 60°C!).
3. In models Redmi Note 8 Pro and older, the battery can be fixed with double-sided tape - it must be carefully cut with a knife (do not damage the body!).

⚠️ Warning: If you see white plaque on the contacts or board when you remove the battery, it's a sign of oxidation. Clean it with alcohol and check the power chain with a multimeter before assembly.

Dismantling motherboard and plumes

The motherboard is the most expensive component of a smartphone, and damage to it often makes repairs unprofitable.

• 📸 Take a picture of the location of all plumes and screws - this will help with the reverse assembly.
• 🔌 Disconnect all connectors (display, camera, buttons, speakers) and use tweezers or a plastic spatula to keep your contacts from bending.
• 🔧 Unscrew the circuit board screws. Xiaomi often uses different length screws -- remember where it was!

Common mistakes when working with the fee:

• ❌ Force to detach plumes – they are fragile and easily torn.
• ❌ Forget to turn off antenna cables (they are attached to the board with small connectors U.FL).
• ❌ Touching boards with bare hands - static electricity can damage chips.

In liquid metal cooled models (such as the POCO F4 GT or Black Shark 5), the board can be glued to the radiator, requiring careful heat with a hairdryer and the use of guitar thread (it is worn at a fee and slowly sawed glue).

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If you're charging to replace a Type-C connector or audio chip, check the power circuit with a multimeter, and often the problem isn't with the connector, but with the capacitors next to it.

Disassembly of the display module

Xiaomi’s screen is made up of several layers: a protective glass, a touch layer, a OLED/AMOLED- matrix (in new models) and a backlight (in LCD- screens), which is difficult to disassemble from the body because of the brittleness of the plumes. If the goal is to replace glass or a matrix, it is better to use a special adhesive for displays (for example, B-7000) and a UV lamp for polymerization.

Procedure:

1. Heat the screen with a hair dryer (60–70°C) around the perimeter to soften the glue.
2. In models with 3D- glass (for example, Xiaomi 11 Lite), be careful - it is thicker and can crack.
3. Disconnect the display and sensor plumes. In Xiaomi, they are often combined into one connector, but sometimes separated (as in the POCO M4 Pro).

If you're replacing the entire screen assembly (glass + matrix), check the compatibility by model number. For example, Redmi Note 9 Pro displays labeled JD9365 or TLX-468 are suitable. Non-original screens may have color or sensor problems.

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When changing the screen, always check the touchscreen and the color display before the final assembly. If artifacts appear after connecting the new display, the problem may be in the plume or board.

6. Build a smartphone: reverse process and testing

Assembly is as important a step as disassembly.

• ❌ Not enough tightened screws → board vibration and loss of contact.
• ❌ A skewed battery → bloating or poor contact.
• ❌ Forgotten protective films on plumes → short circuit.

Assembly order:

1. Set the motherboard and fix it with screws (watch the length!).
2. Connect all the plumes and connectors, make sure they sit tight, but don't get skewed.
3. Install the battery and secure it with double-sided tape. In IP-certified models (such as Xiaomi 13), use a sealant to restore moisture protection.
4. Close the back cover. If it's not tight, check the latches, and maybe one of them broke when you disassembled.

Don't turn on your smartphone right away.

• 🔌 Connect to the charge and check if the current is coming (the charging indicator should catch fire).
• 📱 Press the power button – if the screen is unresponsive, check the connection of the display plume.
• 🎧 Test speakers, microphones and cameras through the engineering menu (code ##4636###).

⚠️ Warning: If the smartphone doesn't turn on after assembly but responds to charging (a burning indicator), the problem may be the power button or its plume. If it doesn't respond at all, check the battery and power circuit on the board.

7. Frequent problems after disassembly and their solution

Even with a careful disassembly, there can be problems. Let's look at the typical cases and how to fix them:

If after disassembly the smartphone began to overheat, check:

• 🔥 Whether the heat paste is applied correctly to the processor (relevant for liquid metal cooled models).
• 🔋 Is the battery swelling (even a slight bloating increases the heating).
• 🛠️ Are the contacts closed on the board (look for foreign particles).

To diagnose hardware problems, use the engineering menu (#4636##) or applications like the CPU Throttling Test (to check for overheating) and AccuBattery (to test the battery).

FAQ: Answers to popular questions