How to Open the Back of Xiaomi Phone: A Guide

Modern Xiaomi smartphones, including the Redmi and POCO series, often require hardware interventions. Users face the need to replace a broken battery, install a new camera or clean the speakers of dust and moisture. The back cover is the first barrier to be overcome to access the internal components of the device.

However, the dismantling process is not as simple as it may seem: Manufacturers are increasingly using high-adhesion thermoactive adhesives to connect the glass to the frame, making it impossible to open the case without first heating. Wrong actions can lead to cracks in the glass, damage to the plumes or even bloating the battery.

In this article, we will discuss in detail the algorithm of actions, the necessary tools and specific nuances for various models: you will learn how to safely warm up the case, which suckers are better to use and how to turn off the plumes without damaging the connectors on the motherboard. Careful follow the instructions will help you perform the repair quality and maintain the aesthetics of the device.

Tools and workplace preparation required

It is essential to have the right workspace before you start, and the surface should be flat, clean and well-lit so that the small screws don't get lost and you can see the state of the microscopic connectors. Static electricity is the enemy of electronics, so it's recommended to use an antistatic mat or at least work on a wooden table, having previously removed synthetic clothing.

The toolkit is crucial to the success of the operation. The use of sharp metal objects such as knives or needles is strongly discouraged, as they can damage the internal elements or shorten the contacts of the battery.

• 🔥 Hair dryer (construction or household with a narrow nozzle) for softening the glue.
• 🛠️ Plastic mediators and suckers for neat opening of the body.
• 🔩 A set of screwdrivers (Torx star, Phillips cross) for twisting screws.
• 🧴 Isopropyl alcohol or special liquid B-7000 glue-residue.

⚠️ Warning: Never use a hair dryer at maximum temperature right away. overheating can damage OLED-display or cause the lithium polymer battery to swell — 80-90 degrees Celsius.

Also, prepare a screw sorting tank. Xiaomi smartphones use screws of different lengths, and if you confuse them with places when you build them, you can damage the thread or penetrate the body through. Marking the mounting places will help avoid this common mistake.

Heating process and primary opening of the body

The most critical step is to soften the adhesive layer. The factory glue becomes elastic when exposed to temperature, allowing the glass to be separated from the frame without effort. The heat must be uniformly throughout the perimeter of the device, paying special attention to the corners where the adhesive layer is usually thicker. Keep the hair dryer at a distance of 3-5 cm from the surface and constantly move it, avoiding focusing on one point.

You can check the body's opening by pulling the suction cup a little bit, and if the glass starts to barely rise, forming a microscopic slit, then the moment is right, and you can carefully insert a plastic mediator or a thin guitar string into that gap, and you can't use the metal blades because they cut the glue rather than pass through it, which increases the risk of damage to the internal components.

Move the mediator along the perimeter, trying to keep it parallel to the plane of the screen. Don't enter the tool too deep, there may be light plumes or sensors inside the glass, and as you move around, you will hear the characteristic crackling of the glue, which signals successful separation of the layers.

Features of disassembling models with glass and plastic back

Xiaomi's smartphone design varies by price segment. Budget models like some versions of the Redmi Note or Redmi with an index of 9A/10C often have a plastic back cover.Plastics are more flexible and forgive small heat errors, but are easier to scratch with a tool.The adhesive layer here can be less aggressive, but additional latches are sometimes used.

Xiaomi Mi and Xiaomi 11/12/13/14 flagship series use tempered glass or ceramics, which require a more delicate approach: Ceramics, for example, are very strong to compress, but brittle when impacted or bended, glass can burst from local overheating, and these models often feature a double layer of glue or an additional frame that needs to be removed separately.

When working with glass panels, it is important to remember the camera. The main camera modules in modern Xiaomi often appear above the body level or fit tightly against the glass. If you sloppyly remove the lid, you can damage the lens or disrupt the focus, which will require an expensive replacement module.

Disconnection of plumes and access to the battery

Once the back cover is successfully removed, you have access to the insides, but you can't rush the battery off. First you have to turn the battery off, you have to find the connector on the motherboard and gently disconnect it with a plastic blade, and only after the power is turned off, you can touch the other plumes.

Xiaomi smartphones often have metal plates that cover the display and battery connectors, these plates are screwed with screws of different sizes. When removing them, use a magnetic mat or circuit to avoid confusing the screws. After removing the protection, the main display plumes and, if any, the secondary screen plume (in folding models) are turned off.

To remove the battery, which is also planted on glue, you can't use metal tools. Under the battery are plumes that are easily damaged. It's best to use special hoods with suction cups or gently tuck the battery with a plastic card, before applying a little isopropyl alcohol under the edge of the battery to dissolve the glue.

⚠️ Attention: If the battery is swelling, you should handle it with extreme caution. A puncture of the swelling battery can cause ignition. Do not squeeze it or try to puncture it to deflate.

If you change only the screen or the back cover, you may not need to fully remove the battery, but it is a must-turn step, ensuring that if the contacts accidentally close, the power controller will not short-circuit and fail.

Assembly of the device and sealing of the housing

The final step is assembly. Before you install the new back cover, you need to carefully clean the frame of the residue of the old glue, using isopropyl alcohol and a plastic scraper, and the surface must be perfectly smooth and fat-free, otherwise the new glue will not fall evenly, and there will be gaps in the case that allow dust to pass through.

For sealing, a special adhesive sealant (e.g., B-7000) or a pre-painted bilateral tape, cut into the shape of the case, the adhesive layer should be continuous, without tearing, especially in the corners. After applying the adhesive, the lid is applied to the body and pressed tightly around the perimeter. It is recommended to lock the device with money bands for 30-60 minutes until completely dry.

When twisting the screws, follow the principle of "star": first, make a little profit of all the screws, then gradually twist them diagonally, this will ensure that the internal boards fit evenly and prevent distortion. After assembly, check the touchscreen, speakers and cameras to make sure that all the plumes are connected correctly.

Frequent errors and ways to fix them

One of the most common mistakes is to damage the plume of the underscreen fingerprint scanner. In modern Xiaomi models, it is often located on the inside of the back cover or on a separate board adjacent to the glass. In a sloppy opening, this thin plume breaks and the scanner stops working. It is almost impossible to restore it, it requires a replacement of the node.

Another problem is that the dust is under the camera or the display after assembly, which happens if the assembly was done in a dusty room, and you can try to remove the dust by opening the case again, but each cycle increases the risk of damage, and it is better to do the final assembly in a room with minimal air circulation, for example, in the bathroom after taking a shower, when the dust has settled.

Some users forget to connect antenna contacts. They are small, spring-loaded contacts that should fit tightly into the board. If you forget to connect them, the phone will not catch the network well, Wi-Fi or Bluetooth will work. Always check for golden antenna antenna antennas in their places before the final screws are twisted.