Smartphone owners often face the challenge of accessing the insides of a device, whether to replace a bloated battery, replace a broken screen, or clean the speakers from dust. With Xiaomi devices and the Redmi line, this process has its nuances as manufacturers increasingly abandon removable covers in favor of monolithic designs. Understanding how to properly and safely open the case saves significant money on services from the service center.
Modern models are assembled using a lot of glue, which makes the disassembly process more difficult than in previous years. Wrong actions can lead to damage to plumes, cracks in the glass or loss of moisture protection, if it is declared by the manufacturer.
In this article, we will discuss in detail the preparation steps, the necessary tools and the sequence of actions for different models, you will learn about the intricacies of working with adhesive joints and the risks that can be faced with careless handling of fragile components inside the gadget.
Necessary tool and workplace preparation
Before any electronic manipulations are initiated, a comfortable and safe workspace must be provided, the table surface must be clean, flat and preferably not conduct static electricity to avoid damaging sensitive chips, and an antistatic mat is ideal, but you can do without it with a simple clean fabric or paper.
To do a good job of disassembling, you'll need a minimal but specific set of tools that you can buy from any radio parts store or marketplace. Using inappropriate items like kitchen knives or thick needles greatly increases the risk of slipping and injuring both the device and the hands of the craftsman.
Be sure to prepare a dryer to heat the adhesive layer, as cold adhesive is almost impossible to separate without damage. SIM-cards before work begins to avoid short circuits or software errors when removing the battery.
- 🛠️ Heating device: Technical dryer or high-quality heating pad for uniform heating of the perimeter of the housing.
- 🎴 Mediators and shoulder blades: Thin plastic cards or special tools for peeling off frames without scratches.
- 🔩 Screwdrivers: It is mandatory to have small cross bits (usually) PH00 or PH000) And sometimes Torx stars.
- 🧲 Magnetic mat: For sorting and fixing screws of different sizes so as not to confuse them when assembling.
⚠️ Warning: Never use metal blades to slash the cover in the display area – this is guaranteed to cause the backlight plume or touchscreen to rupture.
You have to pay special attention to the heating temperature. OLED-You can use a matrix or cause the battery to bloat, so keep the temperature within reasonable limits. 80-90 degrees Celsius 2-3 minute.
Determining the type of design of your smartphone
Before you start disassembling, it is critical to understand what type of design your Redmi model uses, which is divided into models with a removable back cover, a non-removable glass/plastic backrest and an all-metal body (Unibody), depending on the further strategy and set of actions.
Older and budget models often have a plastic back panel that is removed by a simple effort after removing the plug. However, modern flagship and mid-budget lines have moved to glass rear panels glued around the perimeter, which requires mandatory heating. Metal housings, in turn, involve removing the display module along with the frame after unscrewing the screws.
To determine the type of design, you can carefully (without fanaticism) try to tamper with the angle of the back with a mediator. If you feel a backlash and you hear a click, you have a removable cover. If the panel is held dead and there is resistance to the glue, you will need heating. In the case of Unibody, you will see screws hidden under the plugs or directly at the ends of the device.
| Type of body | Autopsy method | Difficulty | Risks. |
|---|---|---|---|
| Plastic (removable) | Mechanical (nail/map) | Low. | Broken latches |
| Glass (glued) | Heat + suction cup | Medium | Broken glass |
| Metal (Unibody) | Spinning screws | Tall. | Damage to plumes |
| Ceramics | Strong heating + accuracy | Very high. | Splitting the hull |
Understanding design helps avoid fatal mistakes, such as trying to unscrew screws on a model where there are none will only result in scratches, and ignoring the screws on Unibody can result in plastic latches breaking when you try to remove the lid by force.
The process of heating and separation of the back panel
If your model involves adhesive, the heating step is the most important. Warm up the perimeter of the device evenly, lingering at the corners where the main layer of the adhesive is usually located. Don't hold the hair dryer at one point for too long, so as not to create a local overheating that is dangerous to the internal components.
After 2-3 minutes of heating, try gently inserting a thin mediator or a safety blade (with a depth limiter) into the gap between the frame and the back cover. Move the tool along the perimeter, making cutting movements to cut through the adhesive layer. It is important to feel resistance: if the tool is tight, add a little more heat.
Use a suction cup to create the initial gap, glue it to the bottom of the back panel (where there is least electronics) and pull it up, while inserting the plastic card into the resulting gap, which creates space for the mediator to work.
Move around, gradually releasing the lid. Don't try to remove it completely right away until you make sure all the edges are peeled off. A sudden movement can damage the fingerprint scanner plume or the on button if they're glued to the back.
⚠️ Warning: It is strictly forbidden to open the case if the battery is swelling. Mechanical impact on the bloated battery can cause it to ignite or explode.
Dismantling internal protection and disconnecting plumes
When you take the back cover off, you'll see the inside of your smartphone. Most Xiaomi models have a plastic pad covering the main board and the battery, can be mounted on screws or latches, and carefully unscrew all the visible screws using a magnetic sorting mat.
The first thing you need to do before you touch any components is to disconnect the battery from the motherboard, and this will turn the device off and minimize the risk of short circuits when working with other plumes, find the battery connector and carefully bend it with a plastic blade.
☑️ Disconnection procedure
Then you can start to shut down the other modules, and the display and touchscreen plumes are usually next to the battery connector, and they can be protected by a metal plate that you need to unscrew, and you can be very careful, because the plumes are very thin and easily break when you're not handling it carefully.
And notice the connector markings, some of which have locking latches that you have to bend up before you take the plume out, and if you pull that plume out without unlocking the lock, you can damage the plug on the board, which requires a lot of maintenance.
Removal of the battery and replacement of components
The battery in modern Xiaomi smartphones is glued to the body using double-sided tape. You can't use metal tools to extract it. You can put a plastic card on the edge of the battery or use special hoods with suction cups.
If the battery sits very tightly, you can gently drop some isopropyl alcohol under the edge of the battery to dissolve the glue. Don't pour the liquid directly onto the board! After loosening the glue gently pull by special tongues (if any) or by the edges of the battery.
When installing a new battery, make sure that its connector sits tightly in the connector. Use special adhesive tapes or double-sided tape specifically designed for electronics to fix the new battery. Don't use superglue - it emits fumes that can damage the camera and sensors, and also becomes brittle over time.
If you're changing other components, like a camera or speaker, check the integrity of the sealing rubber bands. Damage to them will reduce the dust protection of the device. Put all the modules in their places and check if there's anything preventing the case from closing.
Assembly of the device and check of performance
The assembly is done in reverse order, but with one important feature: don't rush to glue the back cover right away. First, plug the battery, install all the plumes, close the protective plates. Turn on the device and check the touchscreen, sound, cameras and sensors.
If everything is working correctly, turn off the phone. Apply a new layer of glue (B-7000 or similar) to the frame of the body in a thin, uniform layer. Avoid getting glue inside the case, on the camera or in the charging connectors.
Put the back cover on and press it tightly around the perimeter, and for better fixation, you can use the stationery gums, pull them cross-to-cross, and leave the device to dry for 1-2 hours, and after drying the glue, the device is ready for use.