How to disassemble Xiaomi Redmi Note 4X: the complete guide

Xiaomi Redmi Note 4X is deservedly considered one of the most successful in the history of the company, but even the most reliable devices require repair over time. Most often users face the need to replace a broken display, a worn-out battery or a failed charging connector. Self-disassembly can significantly save on services of service centers if you have minimal skills with equipment.

However, the dismantling process has its own nuances, which are critically important to consider so as not to damage fragile plumes or drain the battery. In this article, we will take a detailed look at each step, from tool preparation to final assembly, with a special focus on safety and proper handling of components.

Before you start, make sure you have enough free, well-lit space. Any rush or carelessness can damage the case or internal boards, so set up a careful and consistent work. The entry point of the fingerprint scanner plume on this model is at the bottom and requires special care when disconnecting.

Tools and workplace preparation required

A screwdriver is not enough to disassemble a smartphone properly; you will need a specialized toolkit that allows you to work with small screws and fragile structural elements. Using inappropriate items such as kitchen knives or thick needles often leads to scratches on the body and damage to internal plumes.

The best set to work with Redmi Note 4X includes the following items:

• 🔧 Precision screwdrivers (cross-hatched) PH000, PH00) cock-wheel.
• 🎴 Plastic mediators or shoulder blades for neat opening of the body without damage.
• 🌡️ A hair dryer or thermophene to soften the glue fixing the back cover.
• 🧲 Magnetic mat or organizer for sorting screws of different sizes.

Special attention should be paid to the heater. A normal hair dryer may not give you enough temperature, so it is better to use a professional thermophen or at least a powerful temperature-adjusted building hair dryer. OLED-a matrix or plastic frame, so it is important to observe the temperature regime.

⚠️ Warning: Before starting any work, be sure to turn off the device and make sure it is not connected to the charger.Working with the battery on increases the risk of short circuit.

Removal of the back cover and primary dismantling

The process begins by removing the back panel, which in the Xiaomi Redmi Note 4X model is made of metal and planted on an adhesive base. Heat the device's perimeter evenly, paying attention to the corners and faces where the glue freezes most tightly. Don't hold the hair dryer too long in one point so as not to overheat the battery or display.

After heating, gently insert the plastic mediator into the junction between the frame and the back cover. Move the blade along the perimeter, gradually cutting through the adhesive layer. If you feel strong resistance, warm up the area again, but do not use excessive force to avoid deforming the metal.

Once the lid is removed, you will have access to the main components, and at this point, it is important to immediately pay attention to the location of the screws, as they may differ in length and type of thread, and if you confuse them during assembly, you can damage the internal elements or not get into the thread.

Disconnection of the battery and dismantling of protective screens

The first step after removing the back cover is to disconnect the battery plume from the motherboard, a critical step that shuts down the device and prevents accidental short circuits when working with other components.

Then you remove the metal plate that covers the connectors of the plumes, and it's fixed by several screws that you need to unscrew and carefully fold into a separate cell, and underneath the plate are the main plumes: the display, the touch screen and the control buttons.

Use a plastic blade or nail to snap the connectors. Don't use metal objects, because they can close the contacts on the board. Once all the plumes are turned off, you can start removing the motherboard.

Extraction of motherboard and components

The Redmi Note 4X motherboard is secured by perimeter screws and connected to the bottom of the body with a main plume. Before removing the board, you must carefully disconnect the antenna cables if they interfere and unscrew all the fasteners.

When raising the board, act slowly, checking whether any wire or plume has caught. Often users forget to disconnect the main camera plume or flashes, which leads to their break. Visual inspection will help avoid annoying errors.

If your goal is to replace the speaker or microphone, the board will then be removed and the lower part of the case will be accessed, and additional manipulation of the adhesive pads and the latching frames may also be required.

Work with the display module and frame

Replacing the display with the Xiaomi Redmi Note 4X often requires re-painting the module to a new frame, as the screen comes in a bezel or separate assembly. If you change only the glass or matrix, the process becomes much more complicated and requires skills with a separator.

To transfer components to a new frame, you need to carefully remove the old broken module, warming up the adhesive base, then degrease the new frame and apply a special glue B-7000 or use a ready-made adhesive base (scotch).

It is important to evenly distribute the glue and press the module strongly against the frame, fixing it with rubber bands while drying. Uneven gluing can lead to gaps through which dust will penetrate, or to detach the screen during operation.

Assembly of the device and verification of functionality

The assembly is done in reverse order, but it requires the same care, first you install the motherboard and plug all the plumes, and then you can plug the battery in and check the device's performance before you finally twist the screws.

Turn on your smartphone and check the touchscreen, speaker, microphone, cameras and sensors. If everything is working correctly, turn off your phone, turn off the battery, and continue building, installing protective screens and the back cover.

When installing the back cover, make sure the adhesive layer is fresh and sticky.If you use an old cover, remove the remnants of the old glue and apply a new layer or use double-sided tape for smartphones.

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Use rubber harnesses or heavy books to press the back cover for 1-2 hours after assembly, this will ensure reliable grip of the glue and no gaps.

Typical errors and compatibility table

Self-repair often makes mistakes that can cost the device its performance, the most common being damage to the plume when it is untidy or use excessive force when screws are unscrewed.

It’s also important to consider part compatibility, as the Redmi Note 4X has several revisions of motherboards and screens. Below is a table to help you navigate the main components.

Another common mistake is to ignore the screws' condition: If the thread is broken, the screw may not hold the board, which will cause it to shift and possibly close, and in such cases, it is recommended to use screws of similar size from donor devices.

⚠️ Warning: Never puncture the battery with a sharp tool. Damage to the lithium polymer battery can cause fire or chemical burns.

Final stage and testing

Once the device is fully assembled, do a final test of all the features. Call someone to check the microphone and speaker, take some photos to check the cameras, plug in the charger.

If you notice that the phone is warming up in idle mode or quickly discharged, it may be that the battery plume is not fully connected or damaged, in which case the disassembly procedure will have to be repeated to fix the malfunction.

Successful disassembly and assembly of Xiaomi Redmi Note 4X is a valuable experience that will allow you to self-service your equipment in the future.

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Getting the right tools and the right tools in place is 80 percent of the success of a smartphone disassembly. Don't skimp on tools.