Xiaomi’s modern smartphones are not only famous for their functionality, but also for their thoughtful design, which often implies a monolithic design. Device owners face the need to disassemble the case when replacing the battery, installing the NFC module, cleaning the speaker from dust or replacing a broken rear window. The dismantling process can be radically different depending on whether the rear panel is removable or glued.
To an inexperienced user, disassembling the case may seem like a simple process that requires only a screwdriver. However, inside the device are fragile plumes, thin cables and statically sensitive components, damage to which will lead to expensive repairs. It is important to understand that self-inflicted violation of the integrity of the case almost always leads to a loss of warranty obligations on the part of the manufacturer.
Before you start taking action, you need to clearly define the type of design of your gadget. Budget and mid-range models often have a plastic lid on the latches, while the flagship Mi and Redmi Note series of recent years use glass panels on a powerful adhesive layer. Mistake in determining the type of attachment can be fatal to the integrity of your device.
Design type definition and tool preparation
The first step in any repair is to identify the model and type of mounting of the rear panel. In older models such as the Redmi 4X or Redmi Note 3, the lid is removed with a slight effort of fingers. Modern devices, including the Xiaomi Mi 11 or Redmi Note 11 Pro, require heating and the use of special tools to soften the adhesive.
To work, you will need a specialized set of tools to ensure the safety of the procedure, using inappropriate items such as scissors or kitchen knives increases the risk of damage to the internal components and the body itself.
- 🔧 Precision screwdrivers (cross-hatched) PH000, PH00 Torx T4, T5).
- 🔥 Hair dryer (building or household with temperature adjustment) or heat pad.
- 🎴 Plastic card, mediator or special opening tool (spudger).
- 🧲 Magnetic mat for sorting screws of different sizes.
Special attention should be paid to safety.Be sure to turn off the device before starting work and, if possible, discharge the battery to 25%.A fully charged battery can ignite if damaged, and a deep discharge reduces the risk of fire in an accidental short circuit.
⚠️ Note: Using a metal blade to smack the lid is strictly prohibited.The metal can damage the plume of the display going under the frame, or break through the lithium polymer battery, which will lead to instant fire.
Proper workplace preparation is key to success: provide good lighting and space so that small screws do not get lost, and it is also recommended to use an antistatic bracelet or periodically touch a grounded metal object to relieve static stress from the body.
Dismantling of removable plastic cover
If your smartphone is a removable battery or plastic latch cover, it's a lot easier, as you've seen in Redmi's budget lines of the past, and the main challenge here is to find the entry point and gently snap the latches around the perimeter.
Look carefully at the perimeter of the device. Often, there's a small technological groove at the bottom of the case, near the charging connector, and that's where you put a thin plastic tool or nail, and you have to move slowly along the side of the body, and you have to bend the plastic gradually.
The click you hear will signal a successful release of the latch. Don't put too much effort into one spot, it can break the plastic. Move around, sequentially snapping the locks. If the lid is sitting tight, try to warm the perimeter with a hairdryer for 30-40 seconds so that the plastic becomes more elastic.
Once the lid is removed, you will have access to the battery and internal modules, but even then, care is required, and often the main camera plume or fingerprint scanner is placed under the lid, which can be glued to the inside of the plastic panel.
☑️ Check before removing the lid
Disassembly of glued glass and ceramic panels
Xiaomi and POCO’s flagship models use glass or ceramic back panels mounted on double-sided tape or special glue, which provides moisture protection (IP68) and premium appearance, but makes it difficult to access inside.
Use a hair dryer setting a temperature of about 80-100°C. Warm up the edges of the back cover evenly for 2-3 minutes. Do not hold the hair dryer at one point for too long so as not to damage the display or overheat the battery. Check the heating temperature with the back of the palm - the surface should be hot, but tolerant to touch.
After warming up, insert the suction cup into the bottom of the back cover and pull up slightly, creating a gap. In the resulting gap, carefully enter a plastic card or a thin scalpel blade (acting extremely carefully, only horizontally).
In some models, the fingerprint scanner or flash LED can be soldered to the board or connected with a short plume.A sharp jerk of the cover is guaranteed to lead to a break in the contacts.
| Xiaomi model | Type of cap | Difficulty | Should I heat it up? |
|---|---|---|---|
| Redmi 9C | Plastic (removable) | Low. | No. |
| Xiaomi Mi 11 | Glass (glue) | Tall. | Yes. |
| POCO X3 Pro | Plastic (glue) | Medium | Preferably. |
| Xiaomi 12 Pro | Glass/ceramics | Very high. | Yes. |
| Redmi Note 10 | Glass (glue) | Medium | Yes. |
⚠️ Warning: Ceramic covers are very strong, but when heated, they become brittle. A sharp temperature drop or a point bump can break the ceramics, so the warming should be as uniform as possible.
Working with internal components and plumes
Once the lid is successfully removed, you will see the interior of the smartphone. In modern Xiaomi models, almost all components are covered with decorative plastic or metal linings, which are also attached to screws and glue. To access the motherboard, you need to unscrew all visible screws.
Be very careful when disconnecting the connectors. The plumes of the display, battery and cameras are very thin and easily torn. Use a plastic blade to lift the connector up, rather than pulling the plume itself. Before you turn off the battery, always unplug the battery connector from the board first.
This will turn off the device and prevent short circuits when working with other components. If you are planning to replace the battery, make sure that the new cell has the correct geometric dimensions and voltage. Using non-original batteries can lead to unstable operation of the power controller.
When you build back, it's important not to confuse the screws. Xiaomi smartphones use different lengths of screws to attach the board, dynamics and frames. Wrap a long screw into a short hole can penetrate the board through, causing permanent damage.