How to Open the Case of Xiaomi Mi Phone: The Complete Guide

The decision to disassemble a smartphone on its own often comes when the device stops responding to commands, the screen is cracked or the battery needs urgent replacement. Owners of the popular Xiaomi Mi line often face the need to access internal components for diagnostics or dust cleaning. It is important to understand that modern gadgets are complex engineering structures, where each element fits tightly to the other.

The process of opening a sealed case requires not only accuracy, but also a specific set of tools, without which there is a high risk of damaging fragile plumes or breaking glass. Wrong actions can lead to loss of warranty and, in the worst case, complete failure of the device. However, if you weighed all the risks and are willing to act methodically, this article will become your main reference.

In this article, we will discuss in detail the preparation stages, the necessary tools and step-by-step algorithm of actions for various models of the Mi series. You will learn about the intricacies of working with adhesive joints and the features of the location of screws in different modifications of devices. Ready to work begins with understanding the structure of your device.

Tools and workplace preparation required

Before you start dismantling, you need to create a comfortable and safe space, and the ideal would be a table with good lighting, where nothing would distract you, and the surface should be clean, so that the small cogs don't get lost and get inside the device.

You will need a specialized toolkit that can be purchased from electronics stores. The standard kit usually includes a suction cup to lift glass, a set of metal and plastic blades (mediators), as well as screwdrivers of various formats. Particular attention should be paid to the quality of the plastic mediators, as cheap material can break inside the gap.

⚠️ Note: The use of metal objects for tweaking glass or screen is strongly discouraged in the initial stages, as this can lead to chips or cracks on the display.

A hot water heat source is often required to work with adhesives, which can be a temperature-adjusted building dryer or a special heating pad for screens, and a typical household hair dryer usually does not provide enough heat to soften the B-7000 industrial adhesive or the analogues used by the manufacturer.

Features of the design of smartphones Xiaomi Mi

Xiaomi engineers have used different build methods across generations. While older Mi models often had removable back covers or were easily opened through technology holes, today’s flagships are monoblocks, and in such devices all components are hidden behind glass glued around the perimeter.

It's important to remember that there are many plumes inside the housing that connect the display, the battery, and the board, that can run under metal shielding plates or be glued to a frame, and a sudden movement or jerk when you open the lid often causes these thin conductors to break.

Also worth noting is the presence of protective stickers on the screws, which are covered with stickers on some models, which can be interpreted as a sign of self-intervention by the service center, an important aspect for those who plan to maintain warranty status of the device.

Step-by-step instructions for removing the back cover

The first step is always to remove the tray for SIM-Not only will this free up space, but it will also make it easier to grab the device when you're working, and then you need to turn off the smartphone, although in some cases, the craftsmen work with a partially discharged battery for safety, but a complete shutdown is preferable.

Then you heat the perimeter of the device, and you heat it evenly, moving the heat source along the edges over time. 2-3 The temperature should not exceed 80-90 degrees Celsius, so as not to damage OLED-You can check the glue's readiness by trying to twist the back cover slightly with your fingers.

After warming up, you put a suction cup in the top corner, and you pull the suction cup up, you create a little gap, and you put a thin plastic mediator in immediately, and you don't remove the suction cups, you put the mediator along the long side of the body, you cut the adhesive layer, and you have to move forward, without any sudden jerks.

• 🔥 Heat the body evenly, avoiding concentration of heat at one point for more than 10 seconds.
• 🛠️ Use the mediator at an angle. 30-45 degrees to the plane of the screen for effective glue cutting.
• 🚫 Don't put the instrument in any deeper. 3-4 so as not to damage the internal components.
• 🧪 If necessary, use isopropyl alcohol to soften particularly persistent areas of glue.

When all sides are free, the back cover is removed. If it holds, don't use force, you'd better warm up the problem area again, and inside you'll see a metal plate or a plastic panel covering the main nodes.

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Apply a little alcohol to the edges of the lid before heating – this will help dissolve the glue and make the opening process easier, especially if the device has already been opened before.

Dismantling internal components and batteries

When you remove the back cover, you'll have access to the internal structure, and you'll often need to unscrew a few screws to remove the protective cover, which is where the display and battery plumes are hidden, and use a magnetic mat or a sheet of paper with markup to remember the location of the screws, because they can be of different lengths.

The first step is to disconnect the battery plume from the motherboard, a critical step that will power the device down and prevent short circuits from running further, and only after the battery is turned off can the display plumes, cameras and other modules be disconnected.

Removing the battery is the most difficult step. It's often put on double-sided tape. You can't pull the battery over the edges or try to pick it out with sharp objects. Damage to the lithium-polymer battery shell can cause instantaneous ignition. It's best to use special hoods with suction cups or gently warm up the area under the battery.

⚠️ Warning: If the battery is swollen, do not puncture it or bend it. Remove such a battery should be very careful, using plastic cards for tatting.

Assembly of the device and check of performance

The assembly is done in reverse order, but it has its own nuances: before installing a new battery or returning an old one, you need to clean the bed of the residue of the old glue, using isopropyl alcohol and a lilaless wipe, the surface must be perfectly clean and fat-free.

To fix the components, a new glue or double-sided tape is used. The B-7000 glue should be applied in a thin strip along the perimeter, avoiding contact with cameras and sensors. After connecting the parts of the body, the device should be fixed with rubber harnesses or a load for 1-2 hours before complete polymerization of the glue.

The first switch is best done before the final gluing of the body to make sure the touchscreen, the speakers and the vibrator are working, and if everything is working correctly, you can complete the assembly. SIM-maps and the body hangs.

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High-quality cleaning of seats from old glue is a guarantee that the new adhesive layer will lie flat and provide the necessary fixation.

Typical errors and precautions

One of the most common mistakes is ignoring battery safety rules, many newbies try to separate the battery with a knife, which is almost guaranteed to damage it, and there is also a frequent error in the wrong sequence of shutting down the plumes, which can disable the power controller.

Another problem is losing screws or getting them mixed up. In modern smartphones, screws can vary by fractions of a millimeter in length, but screwing a long screw into a short hole can break through the motherboard. Keep a careful record of each element.

• 🔌 Always turn off the battery before working with other plumes.
• 🧲 Use a magnetic card to sort screws by disassembly stages.
• 🌡️ Do not overheat the case so as not to damage the oleophobic screen covering or plastic elements.
• 👀 Work in good lighting and use a magnifier for small details.

If you have damaged a plume or broken glass during the dismantling process, do not try to glue the damaged parts together. These components are only replaceable. Using damaged elements can lead to unstable operation of the device in the future.