Xiaomi Redmi Note 7 Glass Replacement: The Complete Guide

Breaking the display is one of the most common problems faced by owners of the smartphone Xiaomi Redmi Note 7. Despite the manufacturer's stated strength of glass Gorilla Glass 5, an accidental fall or impact can lead to cracks that not only spoil the appearance, but also interfere with the normal use of the gadget. Many users immediately think about buying a new device, but competent replacement of the damaged element can prolong the life of your device.

It's important to understand that the recovery process can involve a complete replacement of the module (display with glass) or a more complex repainting procedure, where only the top layer changes. The choice of method depends on the state of the matrix and your budget. If the image is left clean, without spots and stripes, and the sensor reacts instantly, then it makes sense to consider the option of restoring the protective layer.

Before you start dismantling, you need to be clear about the risks. Self-repair requires care, specialized tools and straight hands. Any wrong movement can damage the plumes or the matrix itself, which will make recovery economically inefficient. In this article, we will discuss all the steps of the work in detail so that you can make an informed decision or successfully complete the procedure on your own.

Diagnosis of damage and choice of repair method

The first step before any work is done is to make a thorough diagnosis of the current state of the screen, and you need to turn on the device and carefully examine the matrix in different lights, and if you see black spots, vertical or horizontal stripes, or the sensor is "glutching" in certain areas, replacing only the external glass will not help — you will need a complete replacement of the display module.

If the glass is broken, but the image is perfect and the touchscreen works without any complaints, you can save a significant amount by replacing only the external glass. However, this process is technically more complicated and requires special equipment such as a separator and a laminator, or use the freezing method at home. Full replacement module is easier to perform, but costs more because of the cost of the component.

⚠️ Warning: If the crack passes through the entire screen area and the shards pour into the case, immediately seal the surface with transparent tape. this will prevent further destruction and the entry of glass dust on the internal components of the smartphone.

The cost of the original module for the Redmi Note 7 can be a significant part of the price of the device itself in the used market. So it often makes sense to consider quality analogues or restored modules. LCD copies will be cheaper, but may be inferior in brightness and color reproduction to the original AMOLED or quality IPS panels.

Required tools and materials for the job

To make a successful repair, it's not enough to have a screwdriver. You'll need a whole suite of specialized tools to open the case without damage and carefully disconnect the plumes. Lack of the right inventory often leads to plastic latches breaking or damage to the case.

Special attention should be paid to adhesives. To fix the display and back cover in Xiaomi uses a special glue B-7000 or E-8000. The use of superglue is strictly prohibited, since its pairs can seal the camera lens or speakers, and the glue itself becomes brittle when frozen and can damage components on the next disassembly.

• 🛠️ Precision screwdrivers (cross-haired) PH000 and flat) - necessary for twisting screws of fastening of board and frame.
• 🔥 Hair dryer building or household heating pad - needed to heat the adhesive base of the display and the back cover before removing.
• 📏 Suction and mediator (plastic blade) - used for careful cracking of the body and separation of layers.
• 🧴 Clay. B-7000 (or analogue) and degreasing - mandatory for sealed assembly and removal of residues of old glue.

It is also recommended to prepare a container with a magnetic lid or a sheet of paper with a drawn circuit to fold the screws in order of their twisting. The screws in Xiaomi smartphones can have different lengths and threads, and confusing them, you can damage the case or board. Tweezers with curved ends will help to tweak the plumes that are deep inside the case.

The process of disassembling the smartphone Redmi Note 7

Start disassembly should always be with the device switching off and extraction SIM-Then you need to heat the perimeter of the back cover with a hair dryer. 80-90 degree 2-3 Do not hold the hair dryer in one spot for too long so as not to damage the battery or screen on the back.

Once heated, the suction cup is placed at the bottom of the back cover, closer to the center, pulling the suction cup upwards, creating a small gap into which we immediately insert the plastic blade, and then we use the tool along the perimeter, trying not to touch the internal components, and we take special care in the area of the fingerprint scanner, if it is built into the button, or in the area of the plumes.

Sequence of action:


1 Perimeter heating (2-3 min).




2. Unplug the back cover with a suction cup.




3. twisting all visible screws.




Removal of the plastic protective bar.

When you remove the back cover, you'll see the inside of the smartphone, and the first thing you need to do is turn off the battery, and you'll bend the safety bar that covers the connectors carefully, and the battery plume will be snapped off with a plastic tool, and then you can continue to disassemble the battery after it's turned off, removing the motherboard and the display module screws.

The display module in Redmi Note 7 is attached perimeter to the glue and is additionally fixed by a frame, heat the front (if we change the glass separately) or gently tweak the module if we change the whole, it is important not to damage the plume, which is often glued to the frame or passes under other elements.

Technology of glass replacement and display gluing

If you've decided to change only the glass, you'll need to separate it from the matrix. In the factory, this is done on a separator where the glass is cut with a thin string (molybdenum thread) under heating. At home, craftsmen use the freezing method: the phone is placed in a sealed bag and refrigerator, after which the glass becomes brittle and easier to separate, but the risk of damaging the matrix is very high.

Once the old glass is removed, you need to thoroughly clean the surface of the matrix of OCA (Optically Clear Adhesive) glue residues. This is done with special solvents and scrapers, but the procedure requires jewelry accuracy. Any scratch on the polarization layer of the matrix will be visible forever. Then a new layer of transparent glue is applied to the new glass panel.

The final step is to put the glued module in a laminator to remove air bubbles and then polymerize the glue under ultraviolet radiation. Without a vacuum chamber, it's almost impossible to achieve perfect transparency, because there will be small bubbles that can grow over time, which is why the glueing method is rarely recommended for self-execution without experience.

Assembly of the device and verification of functionality

Before final assembly and application of the glue, you need to check the performance of the new module. Connect the display and touchscreen plumes to the motherboard without gluing the module itself. Turn on the smartphone and check the display of colors, multi-touch operation (you can use a special application to check the sensor) and the response to pressing on all edges of the screen.

If all tests are successful, we apply a thin layer of B-7000 glue to the frame of a new display or to the body of the phone, evenly distribute it and let it dry for 1-2 minutes, so that it becomes less fluid. Carefully install the module in place, pressing it tightly around the perimeter. Extra glue, exposed to the outside, remove with a dry wipe or cotton swab.

• 🔍 Check the front camera and proximity/light sensors – they are often under glass.
• 🔊 Make sure the speaker is installed correctly and the membrane is not clamped by the body.
• 🔋 Check whether the connector of the battery sits tightly and whether it has not moved away when installing the cover.

The back cover also needs to be cleaned of old glue and degreased, applying fresh glue, pressing the lid and fixing the smartphone with money bands or special clips for drying time (usually 1-2 hours), the complete polymerization of the glue takes up to 24 hours, so on the first day it is better not to expose the device to loads.

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Use rubber rings or stationery gums to tightly press the screen and back cover during drying of the glue. This will ensure better sealability and adhesion of the surfaces.

Typical errors and precautions

One of the most common mistakes is to over-force the plumes. Connectors in Xiaomi are quite fragile, and if handled carelessly, you can break the jack on the board itself or damage the contacts on the plume. Always use a plastic tool and act without jerking, slightly loosening the connection from side to side.

Another common problem is overheating of the battery. When working with a hair dryer, many people forget that lithium polymer batteries are sensitive to high temperatures. Heating above 100 degrees can cause the battery to bloat or even catch fire. If the battery becomes hot to the touch, stop heating immediately and let the device cool.

⚠️ Warning: Never punch a ballooned battery with sharp objects! This can cause instant ignition and chemical burns. The damaged battery must be disposed of at special reception points.

Ignoring the degreasing of surfaces before gluing causes the screen or lid to start to move away after a week or two, and the fats from the fingers, the dust and the residues of old glue reduce the adhesion of the new composition to zero, and use isopropyl alcohol or special electronics wipes to prepare the surfaces.

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The key to success is taking your time, and the rush to disassemble causes plastic latches to break and plumes to break, making simple repairs a complicated and expensive procedure.

Frequently Asked Questions (FAQ)