How to disassemble Xiaomi phone: a step-by-step guide to disassembling

Disassembling a Xiaomi smartphone is a process that requires not only accuracy, but also understanding the internals of modern gadgets. Many users think about self-repair when the screen breaks, the battery fails or a deep dust cleaner is required. However, before you pick up a screwdriver, you need to realize that opening the case automatically deprives you of an official warranty.

In this article, we will take a detailed look at how to safely disassemble a Redmi, POCO or Mi phone, what tools you will need and what hidden risks you may encounter. Modern devices from the Chinese manufacturer often have glass covers and tightly fitting screens, which makes the dismantling process difficult for a beginner.

It's worth noting that the designs of models from different years of production can be very different. If you own a flagship with wireless charging, you'll find more plumes and modules inside than in a budget model with a plastic back panel. AMOLED-screens, softened only at temperature 80-90 degrees Celsius, and ignoring this fact often leads to cracks in the matrix when trying to unstick the glass.

Tools and workplace preparation required

A cross screwdriver is not enough to disassemble a smartphone properly; you need a specialized toolkit that minimizes the risk of damage to plastic latches and plumes. Professional craftsmen use heating elements such as a thermophene or a special heating separator to soften the adhesive layer around the perimeter of the case.

It is also essential to have good lighting and antistatic coatings on the table, and small screws are easily lost, and static electricity can disable sensitive power controllers. SIM-card and memory card if supported by your model.

The basic set of disassembly tools includes:

• 🔧 Precision screwdrivers (cross-hatched) P2, P5 flat).
• 🔥 Hair dryer or heating pad for heating the case (temperature up to 100)°C).
• 💳 Plastic blades and mediators for opening the body.
• 🧲 Magnetic mat or organizer for screws.
• 🧤 Antistatic gloves and tweezers with dielectric sponges.

⚠️ Note: Using metal tools (knives, scalpels) to slap the cover or screen can lead to short circuit on the board or damage to the battery, which is fraught with fire.

Features of the design of smartphones Xiaomi and Redmi

Xiaomi engineers use different build methods depending on the price segment of the device. The Redmi Note series’ budget models often use a plastic back cover that is held on latches and minimal glue, which makes it easier to access the insides, but requires accuracy when passing the perimeter so as not to break the plastic “tendles”.

The flagship models of the Mi and Xiaomi series with numbers (for example, 13, 14) most often have glass rear panels glued around the perimeter with a powerful adhesive. Disassembly of such devices begins with a thorough warming of the faces. Inside you will find NFC-module, often combined with wireless charging, which is pasted directly onto the inside of the glass or on a plastic frame.

An important feature of many smartphones brand is the location of the plumes. In some models, the main plume of the display is under the battery, making it impossible to replace the screen without first removing the battery. In other cases, the battery blocks access to the bottom connectors. Understanding this logic of the architecture of the smartphone is critical for planning the sequence of actions.

Also worth mentioning is the waterproofing. Although many Xiaomi phones are IP53 or IP68-marked, the leakage is broken when disassembled. Factory seals once opened no longer provide the same level of protection, and you should not rely on them for reassembly.

Step-by-step: how to remove the back cover

The first and most important step is to dismantle the back panel, and if you ignore the heat and you try to just rip the lid off with a knife, the risk of damage to the glass or the internal components goes up to 90 percent, and it has to be slow and methodical.

Start by heating the edges of the device with a hairdryer. Keep the heat source at a distance of 3-5 cm, constantly moving it along the perimeter so as not to overheat one point. The surface temperature should become noticeably hot for the hand, but not burning. After that, use the suction cup to create a small gap between the frame and the lid, and insert a thin plastic blade there.

We use the tool along the body, trying not to sink it deeply, you will feel the resistance of the glue and hear the characteristic crackling of the adhesive coming off. In the area of cameras and flashes, be especially careful - there are often plumes that can be damaged by careless movement. If the lid is glass, it can burst from internal stress, so the pressure should be minimal.

Once the lid is successfully removed, put it in a safe place, and you will have access to the main board, the battery and the main camera module, and at this point, it is often found that the screws that attach the protective plates are of different lengths, remember or write down which screw was twisted from where, so that when you build it, you don't get too long a mount.

Dismantling the battery and disconnecting the plumes

Inside a Xiaomi smartphone, the battery usually takes up most of the volume and is often glued to the frame or back cover with double tape. Before any manipulation of the components, you need to turn off the device. Find the battery connector on the board and gently disconnect it by putting a plastic blade up from the bottom.

Metal objects should not be used to remove the battery. If it is glued to the ground, use special hoods with suction cups or gently poke on a plastic card, while warming the area under the battery (on the outside of the case if it is removed, or through the screen, taking care). Lithium polymer batteries are sensitive to punctures: any damage to the shell can lead to instantaneous ignition.

⚠️ Warning: Never try to remove the battery by pulling the plume (with force) and this will cause the power control contacts to break off, and the phone will stop charging even with the new battery.

Once the battery is turned off, you can start to use other components, and the display and touchscreen plumes are usually fixed by metal clipplates, unscrew the screws, remove the plates, and bend the plumes, and it's important not to break them, because they're very thin and they can't be repaired.

Replacement of the display and touch screen: the nuances of the process

The most common reason for disassembly is a broken screen. In modern Xiaomi smartphones, the display module is often a single unit (screen + touchscreen + frame), which makes it easier to replace, but increases the cost of the spare part. If you have a model with a glass back cover, the screen can be glued to the frame, and its replacement will require the complete removal of all internal components.

The process starts with removing the residue of the old glue and cleaning the frame. Use isopropyl alcohol to degrease the surface. When installing a new module, make sure the connectors match in number of contacts and location. Even a millimeter mismatch can cause the touchscreen to fail or artifacts to appear in the image.

To fix the new screen, use a special glue B-7000 or T-7000. Apply it with a thin strip around the perimeter, avoiding hitting the camera lens or speaker. After pressing the screen, allow the glue to dry for 1-2 hours, fixing the device with rubber bands for money.

Assembly of the device and verification of functionality

The reverse order of assembly is done, but it requires even more care. Make sure all screws are twisted but not pulled — broken threads in plastic body racks are a common problem in sloppy assembly. The modular structure of modern phones allows you to assemble them as a designer if you act consistently.

Before you finish the case, if you've used glue, make sure you test it, plug in the battery, plug the display, and try to turn on the device, check the touchscreen, vibrations, speaker and microphone sound, and the cameras, and if everything is working correctly, you can apply a new adhesive layer and close the lid.

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Use new pre-cut adhesives instead of the back cover liquid adhesives, which will provide a more neat look and simplify future parsings, and will also keep the claimed moisture protection better than artisanal sealant application.

The final check should include a test of proximity and light sensors. Often, after disassembly, these sensors may not work properly due to contamination or displacement. Wipe the area of the top speaker and sensors with alcohol. If the screen of the assembled phone responds to late touches, it is possible that the touchscreen plume will be compressed or damaged.

⚠️ Warning: If the phone is warmed up in downtime or discharges quickly after assembly, immediately open it again. Most likely, the battery plume or display is not fully connected, causing a current leak.

Frequently Asked Questions (FAQ)

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Xiaomi’s self-disassembly saves money on the service, but requires the purchase of tools and a high level of accuracy. The risk of damaging the screen or battery in the absence of experience is very high.