Xiaomi Redmi 4X, released in 2017, has proven itself to be a reliable device with a metal body, but time spares no one. Owners often face the need to replace the battery, which loses capacity over time, or repair charging connectors that are loosened from frequent use. The opening process of this device has its own technical features, different from modern models with glass rear panels.
The main difficulty is the design: the back cover is not removable in the usual sense, it is fixed around the perimeter on a powerful adhesive layer and additionally fixed by screws under plugs. Careless movement can lead to deformation of the aluminum alloy or rupture of the plumes connecting the components, so before you start work, you need to carefully prepare and study the algorithm of actions.
In this article, we will discuss in detail how to safely open the Redmi 4X case, what tools you will need and what hidden screws to pay special attention to. You will learn how to heat the glue without damaging the matrix, and how to properly disconnect the plumes so that the phone does not permanently fail.
Tools and workplace preparation required
A screwdriver is not enough to disassemble a smartphone properly; you need a specialized toolkit that allows you to act on the body without causing cosmetic damage. Lack of the right equipment often leads to torn screw faces or cracks in the frame.
First of all, get a heat source. This can be a professional thermoplatform, a hair dryer or a temperature-adjusted building hair dryer. Thermophen is needed to soften the adhesive layer that holds the back panel. You also need suction cups, plastic mediators (scapula) and a thin metal scalpel or blade for primary scalping.
Don’t forget about the set of precision screwdrivers. Xiaomi Redmi 4X most often requires cross screwdrivers size PH000 or PH00. Tweezers with curved ends will help to carefully remove small screws and work with plumes in hard-to-reach places.
- 🔧 Precision screwdriver kit (cross-hatch) PH000/PH00)
- 🔥 Hair dryer or thermoplatform for heating glue
- 📱 Plastic shoulder blades and suction cup for the screen
- 🧲 Magnetic screw-sorting mat
⚠️ Warning: Use the building dryer with caution. The airflow temperature should not exceed 150-180 degrees Celsius, and the distance to the body - be less 3-4 See, otherwise you can overheat. LCD-matrix or melt plastic elements of the internal structure.
Primary dismantling: withdrawal SIM-cockpit
Any disassembly starts with turning off the device and removing the external elements. 4X The first step is to remove the tray for SIM-This must be done before heating, as the metal tray can heat up and deform the plastic inside the case.
After removing the tray, carefully examine the bottom end of the device. Near the Micro-USB connector are two small rubber or plastic elements that hide the screws of the mounting of the lower part of the frame, which must be carefully removed with a thin needle or blade.
Then you turn off the device. Since you can't remove the battery right away, just press the power button until the screen is completely turned off. Make sure the phone doesn't respond to the presses before you go to heat.
☑️ Redmi Preparation 4X post-mortem
Check the perimeter of the body for visible chips or dents. If the frame is deformed, the opening process can be complicated, as the blade will get stuck in the places of bends. Deformation of the body is often found in used devices and requires a more delicate approach when working with the shoulder blade.
Heating and separation of the back cover
The most important step is to soften the adhesive. The rear panel of the Xiaomi Redmi 4X is glued around the perimeter. Warm up the ends of the device evenly, paying special attention to the corners and areas around the camera. The hair dryer movements should be circular so as not to overheat one point.
Once the body becomes hot to the touch (approximately 60-70 degrees), install a suction cup at the bottom of the back cover, just above the Mi logo. Pull the suction cup up, creating tension, and in the resulting gap carefully insert a plastic blade or thin blade.
Don't try to open the lid with a jerk. Run the shoulder blade or a special opening knife along the entire perimeter, gradually cutting the adhesive layer. If you feel strong resistance, stop and warm up the area again. A sharp force can lead to a crack on the aluminum lid or damage to the home button plume if it passes close to the edge.
💡
If there is no suction cup on hand, you can use scotch tape: stick two strips of cross-crust on the back cover, leaving free ends for grabbing with your fingers or tweezers.
Once the blade has passed through the circle, the lid should be easily separated. However, do not rush to remove it completely! There may be connections inside, although in this model the main electronics are protected by a metal screen, and the plumes are below it.
Removal of metal screen and access to the board
Under the back cover is a large metal plate covering the motherboard and the battery, and it's secured by a lot of screws of different sizes. Watch the length of the screws you twist, because screwing a long screw into a short hole can break through the board.
Use a magnetic mat or a piece of paper that has a pre-drawn screw layout on it, which will help you avoid getting confused when you build it back, and in the Redmi 4X, the screws are located around the perimeter of the screen and around the camera module.
Once you've unscrewed all the screws, carefully remove the metal cover, and underneath it you'll see the battery, the main board, and the plumes, and notice the connectors, which can be pressed by metal plates that you also need to unscrew.
| Component | Type of attachment | Risk of damage | Tool. |
|---|---|---|---|
| Back cover. | The glue layer | Tall (cracks) | Fen, spatula |
| Metal screen | Screws (different lengths) | Medium (carving break) | Screwdriver PH000 |
| Battery plume | Connector (latch) | High (cliff) | Plastic spatula |
| Camera module | Screws + connector | Critical (lens) | Tweezers, screwdriver. |
Battery Disconnection and Component Dismantlement
The first thing you do after you remove the metal screen is to turn off the battery, find the battery connector on the board, and gently disconnect it with a plastic blade, and the movement should be directed upwards, not sideways, so as not to break the contacts.
Only after the battery is turned off can you safely work with other plumes: display, buttons, cameras. In Xiaomi Redmi 4X, the main camera plume is located quite close to the edge, be careful when manipulating in this area. Static electricity can also be dangerous, so try not to touch the contact board with your fingers.
If you're trying to replace the battery, you need to remove the two-way tape that holds it, and you need to gently put the battery in a spatula, and if it's sitting tight, you can warm up the battery a little bit, but very carefully.
⚠️ Attention: It is strictly forbidden to pierce the battery or bend it. Lithium polymer cells, when the shell is damaged, instantly light up. If the battery is swelling, remove it with the utmost care, trying not to damage the shell.
How to remove the remnants of old glue?
Assembly of the device and check of performance
The assembly is done in reverse order. Install a new battery or a refurbished component, plug in the battery plume. Before twisting the metal screen screws, a test run is recommended.
Put the display plume on and press the power button. If the screen catches fire and the phone reacts to touch, it's a success. If not, recheck all the connectors: maybe some plume is not fully inserted.
When you install a metal screen, make sure that no plume is hit by the screw or pinched. Then apply a new adhesive layer to the frame. For the Redmi 4X, you'd better use a pre-made adhesive circuit (the B-7000 in the tube will also work, but the contour is more accurate).
- 🔋 Connect the battery and check the switch on
- 🔩 Twisting all the screws of the metal screen
- 🧴 Apply new glue to the frame of the body
- 📲 Press the back cover and lock with rubber bands.
After applying the glue, press the back cover tightly and hold it with stationery bands or a load for 1-2 hours until it is completely dry. Don't turn on the phone right away, let the glue grab.
💡
The quality of the final sealing depends on the purity of the frame: be sure to remove all the remnants of the old glue and degrease the surface before sticking the new cover.