Replacement of glass on Xiaomi Redmi Note 7: detailed instructions with photos and videos

Why does the glass on the Redmi Note 7 burst more often than other smartphones?

Xiaomi Redmi Note 7 is one of the most vulnerable parts of the model, despite the Gorilla Glass 5’s stated protection, because of the design features: a thin adhesive layer between the glass and the matrix, the lack of shock absorbing frames around the perimeter and a fragile aluminum body that does not extinguish shocks. Statistics from service centers show that 78% of screen damage in this model occurs when it falls from a height of less than 1 meter to a hard surface – even protected cases do not always save.

The second factor is thermal expansion. The Redmi Note 7 tends to overheat when it's working hard (playing games, shooting 4K video), which over time weakens the adhesive between the glass and the display. Users often experience a situation where the glass cracks on its own without any visible mechanical influences, due to micro-deformations of the case when heated/cooled.

If you are faced with cracks, do not rush to carry the phone to the service: replacing glass on Redmi Note 7 will cost 3-5 thousand rubles, while self-repair will require an investment of only 800-1500 rubles (subject to the purchase of quality spare parts).

What to replace: a complete list of tools and materials

Before you start disassembling, prepare everything you need, and without the right tools, you risk damaging plumes, tearing contacts off, or damaging a new glass before you even install it.

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-pointed Y00 back-coat).
• 📱 Plastic mediators (2-3 pieces) or guitar mediators – to separate glass from the body.
• 🔥 Dryer or heat tile (at least 1000 W) for softening glue.
• 🧴 Isopropyl alcohol 99% (for cleaning glue residues) and Scotch (for fixing plumes).
• 📦 New glass with adhesive layer (original or qualitative analogue from Tianma or BOE).
• 💡 loope USB-microscope (to check the contacts of plumes).

Pay attention to the quality of glass: cheap Chinese counterparts (priced up to 500 rubles) often have distorted color reproduction and poor oleophobic coatings, the best option is glass from Xiaomi Original Parts (article MB-J1601-001) or certified parts with AliExpress (sellers with a rating above 98%).

⚠️ Warning: Do not use metal blades to separate glass - they scratch the aluminum case and can close contacts on the board. Plastic mediators should be rigid, but not brittle (optimally - polycarbonate).

Preparation of the phone: how not to damage the display during disassembly

The first and most critical step is to turn off the power and heat up the glue, and if you skip this step, the glass will break when you try to separate it from the body by pulling the sensor layer.

1. Turn off the phone and remove it. SIM-card from the tray (it can interfere with disassembly).
2. Heat the body with a hair dryer around the screen for 3-5 minutes, keeping the temperature at 60-70 ° C (not higher!). Overheating above 80 ° C will damage the battery.
3. Plug tape on the cracked glass cross-cross - this will prevent the fragments from breaking apart.
4. Tap the glass with a plastic mediator from any angle (it is better to start with the bottom, where the connectors are located).

If the glass doesn't lend itself, don't force it, reheat the problem area with a hairdryer. The main mistake of the beginners is to try to tear the glass off with a jerk. This leads to a rupture of the sensor plume (replacement cost is from 2000 rubles), move slowly, 1-2 mm at a time, warming up each new area.

Step-by-step: how to remove old glass and not damage the matrix

When the glass has moved a little bit away from the body, move to the complete dismantling, and it's important to avoid hitting the plumes that are attached to the motherboard under the screen.

1. Carefully raise the glass 1-2 mm around the perimeter without tearing it off completely. If it is cracked, use tweezers to remove the shrapnel.
2. Disconnect the plumes: Display plume (wide, with gold contacts); sensor plume (thin, often glued to the main); backlight plume (if any, usually white).

Remove the glue residue

Check the matrix.

Pay special attention to plume connectors, which are often oxidized or contaminated with dust, wipe them with alcohol and check for bends, and if the connector is damaged, the new screen may not work even after installation.

⚠️ Attention: If you hear a characteristic crunch when you separate the glass, it's a sign of damage to the polarization layer of the matrix, and then even after the glass is replaced, the screen will have rainbow spots or darkened areas.

Installation of new glass: how to avoid bubbles and peeling

The new glass should fit into place without gaps and bubbles. UV-glue, LOCITE 3301) or double-sided tape 3M 9448A, It comes with glass. It's an installation algorithm:

1. Apply the glue: If you use UV-glue, apply it thinly around the frame (without touching the matrix!) If you use double-sided tape, stick it onto the frame of the case, removing the protective film beforehand.

Line up the glass.

Lock it down.

UV-lamp

Check the sensitivity.

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If you have bubbles left after installation, don’t try to squeeze them out with your finger, it will cause the glass to shift. Instead, gently tuck the problem area with a plastic mediator and reheat the hair dryer (50-60 ° C), then press it.

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Before you finally fix the glass, turn on your phone and check the sensor. If there are dead zones, reset the touchscreen plume, which may have shifted when you build it.

Assembly of the phone: performance check and calibration

Once the glass is installed, you have to assemble the phone and check all the functions, and at this point, many people forget about the sensor calibration, which causes the screen to float or not respond to touch.

• 🔌 Connect the plumes in reverse order: first the sensor, then the display, then the backlight (if there is one).
• 📱 Install the back cover and twist all the screws (don't tug - the thread in the Redmi Note 7 is soft!).
• 🔄 Turn on your phone and calibrate the sensor via the engineering menu: ##3644633## Select Touch Screen Test → Calibration.
• 🔍 Check the work: Touchscreen sensitivity (scroll, zoom), brightness and color reproduction of the screen (whether yellow or stains), front camera and proximity sensor operation.

If after assembly the screen flickers or artifacts appear, the problem may be:

• Poor contact of the display plume (reconnect).
• Damage to the matrix during disassembly (replacement is required).
• Poor quality new glass (check for protective film on the inside).

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Calibration of the sensor after changing the glass is mandatory! Without it, false touches or "missing" of presses, especially at the edges of the screen, are possible.

Frequent mistakes and how to avoid them: tips from the masters

Even experienced repairmen sometimes make mistakes when replacing the glass with the Redmi Note 7.

• 🔥 Overheating the case when drying glue.A hair dryer at maximum power melts plastic clips inside the phone. ⚠️ Attention: If the back cover is not tightly fixed after assembly, you overheat the body. MB-J1602-003).
• 🧲 Using magnetic screwdrivers, they magnetize the speakers and the Hall sensor, which causes sound distortion or incorrect gestures. Use ceramic or plastic tweezers to work with small parts.
• 💧 It's corroding the polarization layer, making the screen cloudy, so just apply the alcohol to the frame of the body, and clean the matrix with a dry microfiber.
• 📶 Untested parts: glass without oleophobic coating quickly becomes covered with greasy traces, and cheap counterparts have distorted color reproduction (especially noticeable on a white background).

If after replacement the glass began to peel off at the edges, the reasons may be as follows:

• Insufficient heating of glue during installation.
• Use of cheap adhesive (e.g. B-7000 instead of LOCITE).
• The dust hits the glue surface.

FAQ: Answers to Frequent Questions About Glass Replacement