How to remove the lid from the phone Xiaomi Redmi Note 8 T

Removing the back of the Xiaomi Redmi Note 8 T smartphone is a procedure that requires not only accuracy, but also understanding the design of the device. Modern gadgets are assembled with minimal gaps, and using glue to fix the body makes the dismantling process more difficult compared to older models with removable batteries. If you plan to replace broken glass, clean the speaker or replace the battery, you will have to peel off the back cover.

Before any manipulations are initiated, it is critical to realize that self-opening of the case almost always leads to the loss of the official warranty. Xiaomi service centers easily detect the fact of unauthorized interference on broken sealing stickers and traces of heating or tampering. However, if the warranty period has expired or damage is not covered by insurance, the user has no choice but to act independently, taking the utmost care.

In this article, we will take a closer look at the dismantling process, focusing on preparing the workplace and choosing the right tools. Wrong actions can cause plumes to break, cracks in the glass, or even a motherboard to fail, so carefully study each step before picking up tools.

Tools and workplace preparation required

The success of the operation to disassemble the smartphone depends on 80% of the right tools. For the model Redmi Note 8 T, as for most modern devices with a glass rear panel, you will need a specific set. The use of improvised tools such as scissors or kitchen knives is strictly prohibited, as they damage the internal components or hurt.

You'll need a thin metal spatula or scalpel for the initial scalpel, and a set of plastic mediators (openers) for further work. Plastic is preferable to metal when separating the main parts of the body, since it does not conduct current and scratches the surface less. A heating source is also a must: a heat dryer with temperature adjustment or, in extreme cases, a heating pad.

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Use medical alcohol (isopropyl) to dissolve the glue - it does not conduct current and quickly evaporates, leaving no traces on the boards.

Organize the workspace: the table should be well lit and the surface covered with a soft mat or fabric so that the fallen screws do not get lost and scratched. Be sure to prepare a magnetic mat or container with cells for sorting the fastener, as the screws in Xiaomi can vary in length and diameter even within the same device.

Safety Techniques and Preliminary Actions

The first step before any interference with the hardware of a smartphone is to shut down the device completely, and you don't have to rely on just turning the screen off through the menu; you have to press the power button and select "Stop" before you stop all the processes completely, and this minimizes the risk of short circuits if the tools come into contact with the motherboard contacts accidentally.

⚠️ Warning: If the battery is swelling or has visible damage, do not heat the device and do not attempt to remove the cover yourself.Mechanical impact on the damaged lithium polymer battery can lead to ignition or explosion.

Remove the tray for SIM-This is a must, because the tray blocks the opening of the case and can cause the extraction mechanism or the tray itself to break when you try to remove the back panel.

Check the integrity of the screen. If the display module is already broken, it is recommended to tape it carefully before work begins, this will prevent shards of glass from falling during disassembly and protect your fingers from cuts. In addition, scotch will help to preserve the structure of the matrix if you need to apply force to the body.

The process of heating and separation of the rear panel

The adhesive used by the manufacturer to fix the back cover of the Xiaomi Redmi Note 8 T is thermoactive.This means that it softens as the temperature rises, allowing parts to be separated without undue physical effort. The heat should be produced evenly, moving the heat source around the perimeter of the device. Do not hold the hair dryer at one point for too long so as not to overheat the display matrix or battery.

The optimum heating temperature is about 80-90 degrees Celsius. You can determine readiness by touch (careful!): the back panel should become hot, but not burning. Usually the process takes from 2 to 4 minutes depending on the power of the heat dryer. After heating, immediately start putting on the glue until the glue cools.

Insert a thin blade or metal blade at the junction between the frame and the back cover, usually starting at the bottom end or near the charging connector. Carefully, without jerking, drive the tool along the perimeter, gradually cutting through the layer of glue. It is important to feel resistance: if it comes tight, add a little more heat without using brute-force.

Disabling plumes and extracting components

Once the back cover is completely separated from the body, don't try to remove it completely right away. It's connected to the main board by a thin, very fragile fingerprint scanner plume. A sudden movement will cause the contact to break and the fingerprint sensor will stop working. First, visually locate the connection of the plume.

Carefully lift the edge of the lid and unplug the scanner connector from the board, use a plastic blade or nail to do this, slightly lifting the hold up, only after all connections are turned off, you can completely remove the back panel to the side, then access the battery and motherboard protection.

To access the main components, you need to remove the plastic protective cover covering the motherboard, which is attached to several screws, which are often hidden under stickers or have different lengths. Remember or write down the location of each screw, because screwing a long screw into a short hole can penetrate the board through.

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The rule of disassembly is never to pull the plumes. First, snap the connectors, then carefully remove the components.

Comparison of autopsy methods and risks

There are several approaches to removing the lid, each with its own characteristics and degree of risk to the device, the choice of method depends on your qualifications and the availability of specialized equipment. Below is a comparative table that helps to assess the consequences of different actions.

The use of chemical solvents such as acetone or aggressive chemicals is highly discouraged at home, the liquid can leak under the display, cause stains on the matrix or damage the oleophobic coating, and the chemicals are dangerous to health and can damage the plastic elements of the housing.

Mechanical squeezing without preheating is the riskiest method. The Redmi Note 8 T's back cover glass is fragile enough that the applied force to break the cold glue often results in it splitting. If your goal is to keep the lid intact, heating is the only safe option.

Assembly and final recommendations

Reverse assembly is done in reverse disassembly, and before you install the back cover, remove the residue of the old glue from the frame and the panel itself, use isopropyl alcohol and a plastic map, and the surfaces should be perfectly clean and fat-free for the new adhesion layer to be properly adhesive.

Apply a new B-7000 glue or a special adhesive layer around the perimeter. Let the glue dry a little (2-3 minutes), then gently align the lid and press it around the edges. For better fixation, you can use stationery gums wrapped around the body, leaving the device to dry for 1-2 hours.

⚠️ Warning: Do not turn on the smartphone immediately after assembly. Let the glue polymerize for at least 60 minutes. Early on and heating of the device can disrupt the structure of the still fresh adhesive seam.

Once fully dry, check all the functions: vibration, sound, cameras and, most importantly, the fingerprint scanner. If everything is working correctly, the assembly can be considered successful. Regularly check the device for gaps in the first days of operation.

Frequently Asked Questions (FAQ)