How to Open Xiaomi Phone Cover: A Detailed Guide

Disassembling a modern Xiaomi, Redmi or POCO smartphone is a process that requires not only accuracy, but also understanding the design of the device. Most Chinese brand models are assembled in the factory using a large amount of glue to ensure tightness and rigidity of the body, which is why opening the back cover without heating and special tools is almost impossible, and trying to do it “cold” often leads to fatal damage to the glass.

The challenge is that the material in the case dictates the opening method, so if you have a budget model with a plastic back, you're less likely to damage it, but the adhesive layer may be less predictable. 3D-glass or ceramics require jewelry precision, as these materials are prone to cracking under uneven heating or point pressure.

Before you start physical exposure, you need to realize that opening the case automatically voids the warranty. If the warranty period has not expired and the problem is solved in the service center, it is better not to take risks. However, if replacing the battery, screen or plume is the only way out, then following the instructions below minimizes the risk of failure.

⚠️ Warning: Before any work begins, be sure to completely disconnect the battery from the motherboard immediately after opening the first access to the insides.

Tools and workplace preparation required

The quality of the product depends on the equipment used, and it is not necessary to replace a professional heater with a household hair dryer, since it does not give a uniform distribution of temperature throughout the area of the case.

• 🔥 Heating element (thermophene, heating pad or heating plate) for softening the glue.
• 🛠️ A set of precision screwdrivers (usually a cross is required) PH000 And sometimes a Torx star).
• 🪒 Plastic mediators, opening blades or a thin string (nichrome line).
• 💊 Suction cup for primary separation of glass from the frame.

Special attention should be paid to the organization of workspace. The surface should be clean, flat and, preferably, non-conductive. Using an antistatic mat will reduce the risk of damage to electronics by a static discharge that is invisible to the eye but harmful to chips. Also prepare the screw container, since different Xiaomi models use fasteners of different lengths, and confusing them means breaking the motherboard when you build it back.

To separate the lid, a thin metal blade is often used, but you need to be extremely careful with it. Metal can scratch the frame or, worse, damage the plumes if you insert the tool too deeply. Plastic cards or special blades made of polycarbonate bend, but do not scratch the contacts.

Design features and types of fastening

Xiaomi engineers use different methods of fixing the rear panel depending on the price segment of the device. In the budget series of Redmi, a combined method is often found: the top can be held on the latches, and the bottom – on the glue. The flagship models of the Mi and Xiaomi series are almost always completely planted on two-way tape around the perimeter.

Understanding the type of attachment helps you choose the right strategy, and if you hear the characteristic click when you try to tamper with an angle, there may be a mechanical latch installed there, in which case you don't need excessive heating, you need to move the lock quite carefully, but in 90% of cases, the main barrier is polymeric glue, which hardens when it cools and softens at 80-90 degrees Celsius.

It is important to consider the presence of a module NFC-An antenna that is often pasted on the inside of the back cover, and if you open it in a sloppy way, you can damage this thin plume, which will result in the loss of contactless payment function, and you can also have a fingerprint scanner on the lid that is connected to the board with a flexible cable.

The process of heating and primary separation

The most critical step is the beginning. This is where most of the cracking errors occur, and you have to put your phone down on the heating element with a screen, and you have to protect the display with a soft cloth so you don't scratch it against the surface of the heater. The heating temperature shall not exceed 90-100 degrees, otherwise there is a risk of damage OLED-matrix.

Heating time varies from 3 to 7 minutes depending on the thickness of the glass and the power of the heater. Periodically check the temperature of the case with your hand (caution!) - it should become hot, but not burning. After warming up quickly but carefully, install a suction cup at the bottom of the back cover, retreating from the edge about 1-2 cm.

When you create a vacuum with a sucker, pull it upwards, creating a microscopic gap between the frame and the lid. Into this gap immediately enter a thin blade or a plastic card. Don't remove the tool immediately, it will serve as a strut. Next, using the sawing or sliding technique, gradually lead the tool along the perimeter, cutting the adhesive layer.

💡

If the suction cup is not kept on a glossy surface, drop a drop of water or alcohol on the place of gluing to improve tightness.

Technique for safe separation of the body

The movement of the tool should be smooth, without jerks. The blade should be kept at an angle of no more than 30 degrees to the plane of the body, so as not to rest on the internal components. Exercise special care in the upper part of the smartphone, where the display plumes and the main camera are usually located.

If you feel a lot of resistance, don't push harder. It's a signal that the glue is not warmed up in that place, or you've stumbled upon a structural element. Put the phone back on heat for another 1-2 minutes. Use force where you need patience is the main reason for chipping on the glass.

For ceramic-body models, such as some versions of the Xiaomi Mi Mix, it is recommended to use a nichrome string, which works like a dental floss, neatly “sawing” adhesive layer around the perimeter, which takes longer, but ensures that fragile ceramics are safe, which can be easily cracked with a blade.

⚠️ Warning: Never push a metal tool deep inside the body. 2-3 So as not to damage the battery or motherboard.

Disconnection of plumes and access to components

Once the lid is removed, you have access to the insides, but you can't grab the components right away. The first thing you need to do is disconnect the battery connector, which is usually covered by a metal or plastic protective plate that is attached to the screws, twist them out and put them away.

Use a plastic shoulder blade or finger (in dielectric gloves) to snap the connector. Do not use metal tweezers for this action, so as not to close contacts on the board. Once the power is turned off, you can safely work with other modules: the camera, the display, the charging boards.

As you disassemble further, look for hidden screws, which can be hidden under stickers, rubber plugs, or covered with decorative elements. Rotors of different sizes often have different thread lengths, so sort them according to the installation locations.

💡

Correct sequence: Heating -> Break -> Disabling the battery -> Disabling further. Disruption of order can lead to KZ.

Assembly and restoration of leakage

Reverse assembly begins by cleaning the frame and the lid from the residue of old glue, which can be done with alcohol or a special solvent, neatly scraping the residue with a blade, the surface must be perfectly smooth and fat-free, otherwise the new adhesive layer will not lie evenly.

To fix, use a special B-7000 glue or pre-cut adhesive that is sold for specific phone models. The glue is applied in a thin continuous strip along the perimeter. Avoid getting glue on cameras, speakers and connectors.

Once the parts of the phone are connected, you need to lock the device with rubber bands or clamps for 1-2 hours to polymerize the glue. Don't turn the phone on right away, let the materials grab. The full strength of the adhesive joint is gained within 24 hours.

The final step is to test all the functions -- touchscreen, speakers, microphones and cameras -- and if everything works correctly, it's complete.