Removing the back cover from the Xiaomi Redmi Note 7 is a procedure that may be required when replacing the battery, repairing the charging plume, or recovering from a fall.This smartphone, known for its glass panel, requires a special approach, as the glass is attached to a durable two-way tape and easily breaks when handled carelessly. Unlike the simpler models, there are no screws on the outside, making the dismantling process more slim and demanding patience.
Before you start, you need to be clear that any interference with the design of the device will automatically void the official warranty. If you are not confident in your abilities, you should contact the service center, but if you decide, you will need to prepare a workplace and a specialized tool. The main difficulty is that the glass cover is glued around the perimeter, and it requires uniform heating and careful dissection of the glue to remove it safely.
In this article, we will discuss all the preparation and process steps in detail, paying special attention to safety measures. Incorrect actions can damage the display, which in this model is also glass and very fragile, or to break the battery. The heating temperature of the rear cover should not exceed 80-90 degrees Celsius, as overheating can damage the oleophobic covering of the screen on the front side or deform plastic elements inside the case.
Tools and workplace preparation required
The quality and speed of your work depends on how well you've prepared. You don't need a whole arsenal of professional equipment, but a basic set of tools is a must. Use of improvised tools, such as kitchen knives or needles, is strictly forbidden, as they can damage internal components or break glass.
To get started, you will need a dryer (construction or household, but powerful), a sucker, a thin mediator (plastic blade), a set of screwdrivers (usually a cross Phillips #00 or #000) and tweezers. It is also recommended to have isopropyl alcohol or a special liquid to dissolve the B-7000 glue if the cover is installed back. The work surface should be clean, flat and do not conduct electricity, for example, a silicone mat or a wooden countertop.
It is important to ensure good lighting. The internal plumes are very thin, and the connectors can be hidden in the shade. In poor light, it is easy to damage the connectors or lose small screws. Before starting the procedure, be sure to turn off your smartphone and remove the tray. SIM-cards, so as not to damage the mechanism during deformation of the body.
⚠️ Warning: Do not use a metal scalpel to pluck the lid.The metal can easily slip and damage the battery, causing it to ignite or bloat.
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Use a magnetic mat or container with screw cells so as not to confuse them when assembled, as screws of different lengths can penetrate the motherboard.
The process of warming up and detachment of the back panel
The first and most important step is to soften the adhesive layer. Xiaomi's factory adhesive is strong enough, and without preheating, it's almost impossible to tear the lid off without damaging it. Put your smartphone screen down on a soft cloth or a special mat to protect the display from scratches.
Turn on the hair dryer and warm the perimeter of the back cover evenly. Keep the hair dryer 3-5 cm from the surface, constantly moving it so as not to overheat one point. Pay special attention to the corners, because there the glue layer is usually thicker. The heating process takes 2 to 4 minutes depending on the power of the hair dryer. The glass should become warm, but not hot enough to be impossible to touch.
After warming up, gently attach the suction cup to the bottom of the back cover, closer to the charging connector, but not to the very edge. Pull the suction cup up, creating a small gap between the glass and the frame. Insert a thin plastic card or mediator immediately into the resulting slit. Don't remove the card until you start cutting the glue around the perimeter.
- 🔥 Evenly warm up all 4 sides of the body, lingering at the corners.
- 👐 Create tension with a suction cup, but don't pull sharply so the glass doesn't crack.
- 🔪 Lead the mediator parallel to the plane of the body, cutting off the glue, rather than putting the lid up.
Dismantling the protective cover and access to components
Once you've passed the mediator around the perimeter, the back cover should be separated from the frame. However, don't rush to remove it completely. Inside, under the glass panel, there are often plumes going to the buttons or the speaker, although in the Redmi Note 7, the main electronics are protected by an additional plastic cover.
This plastic cover covers the battery, the motherboard and the camera module. It's attached to 10 screws around the perimeter. You'll need a small cross screwdriver. Unscrew all the visible screws, fold them neatly in order of twisting. Some screws can be hidden under stickers or rubber plugs, carefully examine the surface.
Once the screws are unscrewed, the plastic cover is easily removed, but it needs to be done carefully, and underneath it may be a fingerprint scanner plume or a speaker that is better detached before the protection is completely removed. Use a plastic blade to plug the cover from one of the corners.
| Component | Location. | Type of attachment | Risks of withdrawal |
|---|---|---|---|
| Back window | External panel | Adhesive tape | Breaking glass, cutting fingers |
| Plastic protection | The inner layer | 10 screws | Damage to plumes |
| Battery | The bottom part | Glue/Fastening | Breakdown, fire. |
| Maternity fee | Upper part | Screws/Steams | Contact break |
⚠️ Warning: When removing the plastic cover, monitor the position of the flash and microphone, they may fall out of their seats if they were not fixed additionally.
☑️ Check before removal of protection
Battery shutdown and safety measures
Before you touch any other components inside a smartphone, the first thing you need to do is turn off the device, which is the golden rule of mobile repair, and even if the phone is software-enabled, there may be a residual voltage on the board that can cause a short circuit when the display plumes or cameras are disconnected.
Find the battery connector on the motherboard, which is usually in the top or middle of the device, gently slap the connector with a plastic blade or nail, moving from the bottom up, do not use metal tools to avoid closing contacts on the board, after disconnecting the plume, you can safely perform any manipulations with other modules.
If you're planning to change the back cover itself, now is the time to clear the frame of the old glue residue. Use isopropyl alcohol and a plastic card. The surface must be perfectly smooth and fat-free, otherwise the new cover will fall into skewed or unstuck over time.
When working with internal components, try not to put pressure on the board. The Xiaomi Redmi Note 7 motherboard has a dual-layer structure in some places, and strong mechanical stress can lead to detachment of the chips. Also avoid touching the cameras with your fingers, as greasy traces are difficult to remove without disassembling the lens.
What to do if the battery plume does not turn off?
Installation of a new cover and final assembly
The assembly process is reversed, but with the addition of a new adhesive layer. Factory adhesive tape is the best option, as it has the desired thickness and adhesion. If you use liquid adhesive (B-7000), apply it with a thin strip, avoiding camera and speakers.
First, put a plastic cover in place, and twist all 10 screws. Make sure all the plumes are plugged in before you click. Make sure there's any extra parts left. Then you can stick the back glass panel. Combine the camera holes and the speaker, then evenly press the lid around the perimeter.
For a reliable fixation, it is recommended to use rubber harnesses or a heavy book (through a towel) for 15-20 minutes, this will ensure a tight fit of glue. Don't turn the phone on immediately, let the glue grab. Full polymerization takes about 24 hours, but the device holds the primary fixation after half an hour.
- 🧹 Carefully clean the frame of dust before sticking the new cover.
- 🧪 Use a degreaser to improve glue clutch.
- ⏳ Allow the device to lie under the press for at least 20 minutes.
⚠️ Warning: If the phone doesn't turn on after assembly, don't panic. Check if the battery connector is tight. Often the problem is that the plume is not fully inserted.
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Cleaning the frame of the old glue is 90 percent successful when you stick a new lid. Don't be lazy to remove all the bumps.
Frequent problems and their solution
When you disassemble, you often have a problem, like the lid can crack even if you heat it up carefully, and this is a design feature of the Redmi Note 7. If you do, don't try to glue the cracks together with superglue, because it will evaporate and leave a white coating on the internal optics, and you'd better order a new panel right away.
Another problem is that the edges of the lid move away after assembly, which happens if the frame is poorly defatted or if a poor-quality glue is used, and then you have to repeat the removal and cleaning procedure, and it can also be caused by a bloated battery that pushes the lid out from the inside.
If the phone stopped responding to charging after assembly, check the plume of the bottom plume (sub-board). It could move away when pressed on the body. Carefully disassemble the device again and reconnect all the connectors, paying attention to the bottom module.