Replacement of glass on Xiaomi Mi A2 Lite: a complete analysis with nuances and life hacks

The broken glass on the Xiaomi Mi A2 Lite is a problem that almost every second owner of this smartphone faces. The model released in 2018 is still popular due to its balanced characteristics and affordable price, but its fragile display module often cracks even from light blows. The service center will take from 3,000 to 6,000 rubles for a replacement, while self-repair will cost 2-3 times less. However, there is a catch: without knowing the nuances, you can damage the plumes, tear off the connectors or get a broken touchscreen after assembly.

This article is not just a manual to unscrew and glue the glass, but a detailed guide focusing on typical errors, component selection and post-repair settings, how to distinguish the original glass from the fake, why not save on glue, and what to do if the screen starts to float or refuses to respond to touch, and you will also learn why the Mi A2 Lite can not use the method of hot replacement (like on the iPhone), and how to properly disconnect the battery without the risk of short circuit.

Preparation: tools and consumables

Before you start repairing, make sure you have everything you need. The Xiaomi Mi A2 Lite is not the most difficult disassembly machine, but without specialized tools, you risk damaging plastic latches or tearing plumes. Here is the minimum set:

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-beam for screws under the back cover).
• 📱 Plastic mediators (2-3 pieces) for disengaging the body without scratches.
• 🔥 Dryer or heat tile (at least 1000 W) for softening glue.
• 🧴 Clay. B-7000 or T-7000 (Don’t use superglue or moment – they destroy the polarization film!).
• 📏 New glass with adhesive base (original or qualitative analogue from the Nillkin/Spigen).
• 🔋 Tape or capron tape for fixing plumes.

Glass is better to buy complete with adhesive frame - this will simplify the installation. Pay attention to the labeling: the original glass for the Mi A2 Lite has the articulation MDY08-OEM (for the version with 3/32 GB) or MDY08-64 (for 4/64 GB). Counterfeiting often go without oleophobic coating (fingerprints will be more noticeable) and have uneven edges.

⚠️ Attention: If you buy glass separately from the glue, check its thickness with a rod.The optimal value is 0.21-0.23 mm. thicker glass will worsen the sensitivity of the touchscreen, and thin glass will quickly be covered with microcracks.

Disassembling the phone: a step-by-step process

Start by turning off the phone and retrieving it. SIM-We're going to do it carefully. A2 Lite has brittle plastic latches that are easy to break.Follow the algorithm:

1. Removal of the back cover: 🔥 Heat the hair dryer of the edge of the body (temperature) ~60°C) for 2-3 minutes. 📱 Insert a plastic mediator into the gap between the lid and the frame (start with the lower right corner). ⚠️ Don’t push too hard – there are antenna wires under the lid!

Battery disconnection:

Under the lid, you'll see 15 screws -- unscrew them all (remember the location, they're of different lengths!) Then gently tuck the battery connector into a flat screwdriver. Don't pull the wire -- it's soldered to the board!

Removal of the display module:

The module is mounted on 4 screws and glue around the perimeter. Heat the screen with a hair dryer (not higher than 70 ° C!), then put it with a mediator on the left side. The touchscreen and display plumes are located at the bottom, they need to be disconnected last.

If the screen doesn't lend itself, don't apply force -- most likely, the glue hasn't softened enough. Reheat for another 1-2 minutes. On the Mi A2 Lite, the touchscreen plume is soldered to the motherboard, so if you break it, you'll need a soldering station to recover.

Is the phone off-charging?|Whether SIM-memory-card?|All 15 screws unscrewed?|Is the battery connector disconnected?|Whether the glass is heated to 60-70°C?-->

Removal of old glass: methods and risks

So here's the hard part: the glass on the Mi A2 Lite is glued to the display, and you have to separate it without damaging the matrix. There are three methods:

For home repairs, the best method is with thread.

• 🧵 Capron thread thickness of 0.15–0.2 mm (can be taken from guitar strings).
• 🧴 Acetone or solvent for glue (applied to the edge of glass to soften).
• 🔧 Filament tweezers.

Process:

1. Stick tape to the matrix to protect it from scratches.
2. Put the thread under the glass in one of the corners.
3. Drink back and forth, periodically dripping acetone on the glue.
4. After separation of glass, clean the matrix from glue residues with alcohol.

⚠️ Warning: If there are shards of glass left on the matrix, don't try to scrape them off with a knife! Use a soft brush and alcohol. Even micro-scratching on the polarizer will cause dead pixels to appear.

Installation of new glass: glue and calibration

Now we're going to take the most critical step, and the new glass should be perfectly clean, and even the speck of dust underneath will be visible.

1. Clean the matrix: Wipe the display with a lilaless napkin dipped in isopropyl alcohol (90%+ concentration). Make sure there are no scuffs on the surface - they can cause optical distortion.
2. Applying glue: If you have a glass with a glue frame, just remove the protective film. If the glue is separately, apply it point-by-point around the perimeter (not in the center!). For the Mi A2 Lite, 0.5-0.7 ml of B-7000 glue is enough.
3. Stick: Carefully place the glass on the matrix, starting at the top edge. Press it evenly (you can use a heavy book). Remove the excess glue with a napkin.

After gluing, do not turn on the phone for at least 2 hours - the glue takes time to polymerize. If you are in a hurry, use a UV lamp (a 365 nm wave) to speed up the process (10-15 minutes is enough).

The phone is assembled in reverse order, and you'll pay special attention to:

• 🔌 Connecting the plumes (they must click when fixing).
• 🔋 Battery fixing (check if it is bloated).
• 📶 The cables (if they are broken off, the network will disappear).

💡

Before final assembly, check the touchscreen in the service menu. To do this, type the code ##4636## and select "Testing" → "Touch screen." If the screen is not responding correctly, recalibrate.

Calibration of the touch screen after glass replacement

Even if you set the glass perfectly, the touchscreen can malfunction: skip touch, swim, or react with a delay. This is due to a change in the thickness of the glass and requires software adjustment. There are two ways of calibrating on the Mi A2 Lite:

Method 1: Through the Engineering Menu

1. Open the phone keyboard and type ##3644633##.
2. Select the Touch Screen Test.
3. Press Calibration and follow the instructions on the screen (usually touch 5-7 points).

Method 2: With ADB (for Advanced)

If the engineering menu is not available, use the command:

adb shell am start -n com.android.settings/.DevelopmentSettings


adb shell input touchscreen calibrate

After completing, restart the phone.

If the calibration didn’t help, check:

• 🔧 Is the touchscreen plume correctly connected (sometimes it flies off when assembled).
• 📏 Does the new glass match the original thickness (permissible deviation — ±0.02 mm).
• 🔄 Update the firmware to the latest version (in older versions) MIUI There were touchscreen bugs).

⚠️ Note: If the glass is replaced with a mirrored screen, you have damaged the plume of the display, and you will need to replace the entire module, not just the glass.

💡

Touchscreen calibration is mandatory after glass is replaced! Without it, false positives, misses touches or cursor drifts when entering text are possible.

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when replacing glass with Mi A2 Lite, and here are the most common mistakes and ways to prevent them:

• 🔥 Overheating matrix: If you use a hair dryer at maximum power, you can melt the polarization film. Solution: Keep the hair dryer at a distance of 5-7 cm and do not heat one point longer than 10 seconds.
• 🧲 Magnetic interference: The screws near the speaker and the camera are magnetized -- if you mix them up, you'll get audio distortions or artifacts in the photo. Solution: fold the screws in the order of unscrewing them onto a magnetic substrate.
• 📶 Network loss: Antenna wires are easy to tear off when the back cover is removed.Solution: Fix them with tape before heating.
• 🔋 Short circuit: If you don't disconnect the battery before work, you can burn the board. Solution: Always turn off the battery connector first!

Another common problem is that glass detachment occurs after 1-2 weeks, and this happens because of:

• Insufficient amount of glue (apply it with a solid line, not dots).
• Dust or fat on the matrix (clean the surface with isopropyl alcohol, not conventional medical alcohol).
• Use of cheap glue (e.g., the moment of the crystal destroys the polarizer in a month).

If the glass does come off, don't try to glue it on top, it will cause bubbles, it's better to remove it completely, clean the surfaces and repeat the procedure.

Where to buy spare parts and how much it costs

Glass prices for Xiaomi Mi A2 Lite range from 300 to 1,500 rubles depending on quality and configuration.

When choosing glass, pay attention to:

• 📋 The presence of oleophobic coating (repels fingerprints).
• 🔍 Thickness (must match the original - 0.21 mm).
• 📏 The cutout for the speaker and camera (on cheap glasses it is often displaced).
• 🎨 The color of the polarization film (the original is slightly blueish).

If you buy glass with a glue frame, check its quality: it should be soft and elastic, not hard (such frames peel off quickly).

FAQ: Frequent questions about glass replacement