Disassembling the Xiaomi Mi A2 is a challenge that owners face when replacing the battery, repairing the camera or cleaning up dust. Despite its apparent simplicity, improper removal of the lid can lead to cracks in the case, damage to the plumes or even loss of leakage (if the phone previously came into contact with moisture).
Mi A2
glue-mount
frequent
Let’s start with a detailed review of the process, but first, an important warning:
⚠️ Attention: If your Xiaomi Mi A2 If you're in high humidity or have fallen, you might have micro-cracked the board, and if you're not diagnosing it, you might have a short circuit when you turn it on.
1.Preparation: tools and conditions
To safely remove the Mi A2 cover, you will need:
- 🔧 Plastic mediator (or guitar) – metal instruments will leave scratches on the aluminum body.
- 🔥 Building hair dryer (or powerful household hair dryer) - for softening the glue. Optimal temperature: 60-80°C.
- 🧲 Suction cup (better with a ring) - helps to separate the cover after warming up.
- 📏 Thin plastic card - for neat tweaking in corners.
- 🧴 Isopropyl alcohol (90%+) — glue-residue.
The workplace should be:
- 🪑 Smooth and steady – Sliding the phone on the table can cause a fall.
- 💡 Well-lit – use a desk lamp or flashlight.
- 🧹 Clean from garbage - dust under the lid will worsen tightness.
Important: Turn off the phone before disassembling! Even when the circuit board is off, the contacts can be closed when moisture or metal particles hit. If the battery is swelling, do not heat the case with a hairdryer (ignition risk!).
2. Warming up of the body: temperature and technique
The glue that Xiaomi uses to fix the lid loses adhesion when it heats up. OLED-You can either melt plastics or you can use the algorithm:
- Adjust the hair dryer to a temperature of 70-80 ° C (the "hair drying" mode in most household models).
- Keep the hair dryer at a distance of 5-7 cm from the body, evenly driving around the perimeter for 2-3 minutes.
- Pay special attention to the corners - there is usually more glue.
- Check the temperature of the body with your hand: it should be warm, but not hot.
⚠️ Critical error: Many only heat the center of the lid, but the glue concentrates at the edges! this leads to a broken body when trying to separate it with a suction cup.
After warming up, immediately proceed to the next step - the glue cools in 30-60 seconds.
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If you don't have a hair dryer, use hot water in a bag: Put the phone in a sealed hot water bag (60°C) for 5 minutes.The method is less effective, but works as a last resort.
Separation of the cover: technique and forces
When the body warms up, perform the following actions:
- Apply a suction cup to the bottom of the lid (above the Mi logo).
- Pull it up carefully - a small gap should appear.
- Insert a plastic mediator into the gap and slowly lead it along the edge, separating the glue.
- Don't put too much effort! If the lid doesn't lend itself, warm up for another 1 minute.
Typical problems at this stage:
- 🔊 Crunch or crack is a sign of broken body. Stop disassembling and warm up again.
- 🔌 The lid bounces, which means the glue has not moved evenly. Use the mediator to step away.
⚠️ Attention: In Mi A2 The fingerprint scanner plume runs under the top edge of the lid, and if you pull the lid too hard, the plume can come off!
Is the cover separated along the entire perimeter?|Is the fingerprint scanner plume visible?|Are there any cracks in the body?|The temperature of the cover does not exceed 40°C?-->
4. Work with glue and plumes
After removing the cover, you will see:
- 🔋 Battery - fixed with glue, but disconnected from the board.
- 📸 Double camera – attached to a metal frame.
- 👆 The fingerprint scanner plume is thin and fragile.
- 📶 Antenna contacts – on the sides of the body (do not touch them with metal objects!).
First action: Carefully unplug the fingerprint scanner plume (which is attached to the motherboard) and use a plastic blade to plug the connector.
Remove the glue residues on the cover and body with isopropyl alcohol. Do not use acetone or solvents - they will damage the coating!
| Element | Cleaning recommendation | What can't be done |
|---|---|---|
| Body (aluminum) | Alcohol + microfibre | Metal scrapers, abrasives |
| Camera (glass) | Dry microfiber | Moisture, alcohol on lenses |
| plumes | Compressed air (cylinder) | Direct mouth blowing |
| Battery contact | Alcohol + Cotton Swab | Water, metal objects |
What to do if the fingerprint scanner plume is broken off?
5. Reverse assembly: nuances
When you install the lid back:
- Apply new glue around the perimeter of the case, and a B-7000 or a specialty glue for smartphones will do.
- Make sure the fingerprint scanner plume is not clamped and inserted correctly into the connector.
- Press the lid evenly, starting at the top edge (where the cameras are located).
- Place the phone under a press (such as a stack of books) for 10 to 12 hours to polymerize the glue.
⚠️ Critical point: If after assembly the phone does not turn on, check:
- 🔌 Is the battery connected to the board (sometimes the connector "pop up").
- 🔋 Are the contacts of the battery closed with the residues of glue.
The first activation after assembly, perform from the charger - this will reduce the load on the battery.
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The use of Xiaomi's original adhesive (article MDY-08-EM600) ensures that dust moisture protection is kept at IP53 level.
6. Alternative methods (if the cover is not amenable)
If the standard method doesn’t work, try:
- 🧊 Cold-warming: alternate between dryer heating (1 minute) and freezer cooling (10 minutes.
- 🧂 String or fishing line: Pass a thin thread under the lid and "saw" the glue, pulling in opposite directions.
- 🔧 Special tool: iFixit disassembly kit includes shoulder blades with curved ends for hard-to-reach places.
⚠️ Last chance: If the lid cracks but the phone works, don't try to glue it with superglue! This blocks access to the insides in the future: MB1000689).
7. Where to buy spare parts and tools
For Xiaomi Mi A2, suitable components are sold:
- 🛒 AliExpress – original and non-original covers (price: 800-1500) ₽).
- 🏬 Local service centers – often sell used parts after warranty repairs.
- 🔧 Tool shops – mediator sets and suction cups (e.g. iFixit Pro Tech Toolkit).
When buying a lid, check:
- 🔍 Color code matching (e.g. Black Matte or Gold).
- 📏 Availability of microphone holes and speaker (in fakes they can be displaced).
- 🔋 Compatible with your modification (Mi) A2 or Mi A2 Lite – the covers are not interchangeable!).