Modern smartphones like the Xiaomi Redmi Note 7 are made in glass cases, which gives them a premium look, but significantly complicates the repair process. The rear panel is not just a decorative element, but an important part of the design that protects the internal components from dust and moisture. The need to remove the back cover can arise for various reasons: broken glass, replacing the battery or simply thoroughly cleaning the internal elements from accumulated dust.
The dismantling process requires precision, patience and a specialized tool. Glass is a fragile material, and if handled carelessly, there is a high risk of sharp shrapnel or damage to the underscreen frame. Unlike older models with plastic covers, it uses thermoactive glue, which must be preheated to a certain temperature.
In this article, we will take a look at each step of the procedure, and you will learn about proper heating, glass-clearing techniques, and precautions to save your gadget from permanent damage. Even if you have never opened a machine before, following the instructions will help minimize the risks.
Tools and workplace preparation required
Before you start disassembling the Redmi Note 7, you need to organize the workspace. The surface must be clean, flat and well-lit so that you can see the smallest details and screws. Loss of fasteners or dust entering the body can lead to serious problems during assembly.
To do this successfully, you'll need a toolkit that's often called a repair kit. Without the right equipment, trying to remove the glass will turn into a lottery with a high risk of damage to the matrix or plumes.
- 🔥 Hair dryer or heating pad - for uniform heating of the adhesive layer along the perimeter of the body.
- 💳 Plastic card or mediator - for careful stratification of glue without scratching metal.
- 🪛 Torx screwdriver T5 or T6 — necessary for twisting screws hidden under plugs.
- 🧲 Magnetic mat – will help you not lose tiny screws and spread them in the right order.
- 🧴 Isopropyl alcohol - used to clean the remnants of old glue from the frame.
Pay special attention to the choice of heating element. A normal hair dryer may not give enough temperature, and a building hair dryer, on the contrary, is too aggressive and can overheat the glass in seconds.
☑️ Preparation for disassembly
Remember that the absence of even one of these tools can make you improvise, which in electronics repair often leads to breakage.The use of metal blades instead of plastic is strongly discouraged at the peeling stage, as there is a great chance of damage to the plumes located immediately under the glass.
Safety Techniques and Precautions
Disassembling a smartphone carries risks not only for the device, but also for the wizard. Inside the Xiaomi Redmi Note 7 is a lithium-polymer battery that can catch fire or swell if damaged, and shards of broken glass can injure your fingers.
⚠️ Warning: If the battery in your device is swelling, do not press it or try to pierce it. Remove the device from the housing as carefully as possible, avoiding mechanical impact on the bloated element.
Before starting any work, be sure to turn off your smartphone. Working with the device on can lead to a short circuit if you accidentally close the contacts on the board with a metal tool or a piece of debris.
- 🧤 Wear safety glasses – they will protect your eyes from small pieces of glass that can fly away when heated or dismantled.
- 🧤 Use antistatic gloves – this will prevent fat from entering the internal components and protect the electronics from static electricity.
- 🚫 Do not use water – only use isopropyl alcohol to clean the frame, as the water will cause corrosion.
It is important to understand that the warranty seal during disassembly will be broken. If your smartphone is still in warranty service, self-opening will deprive you of the right to free repairs in the authorized service.
Risks of self-disassembly
If you feel insecure or see that the glass is too strong and does not lend itself, it is better to stop and consult the professionals.
The process of heating and softening the glue layer
The key step in the question of how to remove the back cover on Xiaomi Redmi Note 7, The glue that glues the glass to becomes elastic only when it reaches a temperature around the 80-90 Not heating enough will cause the glass to crack under pressure, and excessive - will damage. OLED-display or melt plastic frame elements.
Heat the device evenly, driving a hair dryer around the perimeter of the rear panel. Do not hold the jet of hot air at one point for longer than 2-3 seconds. The total warming time is usually from 3 to 5 minutes depending on the power of the hair dryer and ambient temperature.
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Check glue readiness: periodically (every 30-60 seconds) try the suction cup to pull the glass slightly, if it starts to deform slightly or move away, then the glue has warmed up enough.
After warming up, let the smartphone cool down a little during the 30-40 This is to keep the glass from getting too hot for the hands, but the glue hasn't yet frozen.
- 🌡️ Control the temperature – if you have an infrared thermometer, make sure the surface temperature is below 100.°C.
- 🔄 Move around in a circle – warm up the sides sequentially (consistently), without focusing only on the center.
- ⏱️ Keep timing – do not heat the device for more than 10 minutes in total, so as not to damage the battery.
Some craftsmen use special heating plates that put the phone down, a safer method because it ensures uniform heating of the entire glass area at the same time, minimizing the risk of local overheating.
Dismantling the back panel: step-by-step instructions
Once the glue is softened, the most critical moment comes: you'll need a suction cup and a thin plastic mediator, attach the suction cup to the bottom of the back cover, closer to the center, and pull up slightly, creating a small gap between the glass and the frame.
Insert a plastic card or mediator into the gap, do not insert the instrument deeper than 3-4 mm, so as not to damage the plume of the fingerprint scanner, which runs close to the edge, move the tool along the perimeter, cutting the adhesive layer.
⚠️ Attention: There are plumes at the top of the smartphone, next to the main camera module. Be (especially) careful in this area and try not to make sudden movements of the instrument upwards. Move slowly, releasing the lid by a millimeter. If you feel strong resistance, stop and warm up this area again.Force (force) here will not help, but only lead to cracks. 📊 The back of the scanner frame of the body When the entire perimeter is passed, the back cover should easily separate. Remove it and place it with the outside side down on the soft fabric so as not to scratch the glossy surface. Now you have to turn off the fingerprint scanner plume, unless it detached itself during the process of removing it, it can be attached to double-sided tape or glued. Carefully tuck the connector in with your nail or plastic spatula. When you access the insides of the Redmi Note 7, you see the main board, the battery and the bottom board with the charging socket. Most often, the purpose of disassembly is to replace the battery. The battery in this model is also glued to double-sided tape. Use a plastic card to remove the battery, peel it from the bottom, trying not to prick the shell, and if the battery is swelling, proceed with utmost care, as it is enlarged and takes up all available space. Component Location Fixing Risk of damage Battery Central Adhesive Tape High (puncture) Scanner Trail Upper End Clamp/Glue Medium (cliff) Main Board Top Third of the screw + Low (with accuracy) Vibromotor Low end of screws Low When installing a new battery make sure that the connector sits tightly in the connector. For fixation, use a new duct tape, which is often packed with a battery, or apply a little special glue. B-7000 edge. 💡The main rule when working with a battery is never to use metal tools to remove it from the case, only plastic. If your goal was not to replace the battery, but to clean, use a soft brush and isopropyl alcohol to remove dust from the board and speakers. Compressed air also does a great job of dusting in hard-to-reach places, assembly of the device and testing of the functionality of the Assembly is done in reverse order, before installing the back cover, you need to carefully clean the frame of the residue of old glue. Use a blade or knife to scrape off large pieces, then wipe the surface with alcohol (B-7000 or T-7000) a thin layer on the frame or on the cover itself. Let the glue dry. 1-2 You can take a minute to make it less fluid, and you can combine the lid with the hull, and you can press it tightly around the perimeter. 🔧 Twisting all screws – make sure no screws are left over, especially those that hold the charge. 🧹 Wipe the glass – remove fingerprints and dust from the outside and inside before the final pressing. ⏳ Let it dry – put the phone under the press (for example, under a stack of books) on the 2-4 After assembly, turn on the device and check the touchscreen, cameras, speakers and fingerprint scanner, and if the scanner is not working, you may have misconnected the plume or damaged it in disassembly. ⚠️ Warning: If the phone doesn't turn on after assembly or the screen doesn't light up, don't rush to disassemble it again. 15-20 minutes - the battery may have been completely discharged during the operation. A well-designed rear cover replacement not only gives the smartphone its look, but also its protection from moisture (although the factory IP level will no longer be guaranteed). A properly selected glue will provide a tightness sufficient to protect against splashes and dust. Can the hair dryer cover be removed? Theoretically, using special chemical adhesive solvents, it is extremely risky. The liquid can leak under the screen and damage the matrix. Heating is the only safe and proven method for the Xiaomi Redmi Note 7. What if the glass cracks when the camera is not cracked, you can not remove the new components from the back, but you can better remove them from the back from the back? It's mounted on the main board, and it doesn't interfere with the battery or the adhesive layer of the lid. Which glue is better for gluing? The best choice is the B-7000 or T-7000 glue. They remain elastic after drying, allowing you to reopen the device if you need to, and have good adhesion to the glass and metal. Does removing the lid affect moisture protection? Yes, the factory seal is broken. Even with quality glue, the water level will be lower than factory's. It's not recommended to immerse the phone in the repaired water.