Replacement of the back cover Xiaomi Redmi 9T: full instructions

The broken back of the smartphone is not only an aesthetic problem, but also a direct threat to the internal “stuffing” of the device. Xiaomi Redmi 9T, made of plastic, is quite durable, but a strong blow can split the camera glass or the lid itself, violating the tightness of the case. Moisture and dust, getting inside through cracks, can disable the motherboard in a matter of days, so you can not ignore the damage.

The process of replacing the back cover on this model is considered one of the easiest in the class of budget smartphones, since it does not require a complete disassembly of the device. You do not have to unscrew dozens of screws or turn off the plumes of the display if the battery is intact. However, even in such a seemingly simple operation there are nuances, the knowledge of which will save you from unnecessary costs and repeated breakdowns.

In this article, we will discuss in detail how to independently and safely replace the back cover with the Redmi 9T. We will consider the necessary tools, stages of dismantling the old panel, surface preparation and final assembly, paying special attention to the adhesive layer, which ensures a tight fit of parts.

Diagnosis of damage and selection of components

Before starting to disassemble, you need to assess the scale of the disaster. Often a crack in the rear of the Xiaomi Redmi 9T is accompanied by damage to the main camera module or side frames. If the glass of the lens is broken, simply replacing the lid will not solve the problem - moisture will enter the interior, in which case you will need a separate replacement of the camera glass or the entire module.

When choosing a new part, it is important to pay attention to the quality of the plastic and the presence of a factory adhesive layer. The original covers have perfect geometry and precise holes for the camera module, while cheap copies can have backlashes or millimeter inconsistencies, which is critical for tightness. It is also worth checking the presence of the Redmi logo and surface texture so that the device does not look cheap.

⚠️ Warning: If a crack on the back cover extends deep into the end of the body, be sure to check the integrity of the side frame. deformation of the frame can cause the new cover to simply not stand in place or will move away.

There are two main options for purchasing a spare part: buying a cover with an already applied adhesive layer (B-copy or original) and buying a “holoon” panel with a separate tube of B-7000 glue. The first option is preferable for beginners, since the factory glue is applied uniformly and requires only activation by heating, while hand glue can leak onto the camera or speaker if applied carelessly.

Tools and workplace preparation required

The Xiaomi Redmi 9T’s successful rear replacement does not require professional equipment, but a minimum set of tools is required.The main task is to carefully warm the body perimeter and separate the plastic panel without damaging the internal components. The workplace should be well lit and the desk cleared of small metal objects to avoid accidental circuits.

You will need the following tools:

• 🔥 Hair dryer (construction or powerful household) for softening the glue around the perimeter.
• 🎴 Plastic card or thin mediator for snapping latches.
• 🔧 Suction cup (preferably metal or high-quality plastic) to create an initial gap.
• 🧴 Clay. B-7000 or E-8000 (if there is no new coating on the new cover).
• 🧼 Alcohol isopropyl and lilaless napkin for degreasing.
• 🪒 Thin blade or scalpel to trim old glue.

You should pay special attention to the purity of the surface. Any grain of sand or villi that falls under the new lid will create a bump through which moisture can enter in the future. Before starting work, be sure to turn off your smartphone and remove it. SIM-a tray if it interferes with access to the screws (although in Redmi) 9T There are no screws under the lid, it is better to remove the tray for safety).

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Use the suction cup only at the bottom of the lid, away from the main camera module. Heating and vacuum pressure in the chamber area can damage optical stabilization or displace the lenses.

The process of dismantling the old back panel

The most critical step is to remove the damaged lid. Xiaomi Redmi 9T plastic is glued around the perimeter and needs to be warmed evenly. Turn the dryer on at medium power and drive a jet of hot air along all four faces of the device for 2-3 minutes. Do not hold the hair dryer still at one point, so as not to overheat the display matrix or battery.

After heating, gently apply the suction cup to the bottom of the back cover and pull up, creating a small gap. Insert a mediator or a plastic card into the resulting gap. Start slowly driving the tool along the perimeter, feeling the resistance of the glue. If the tool is struggling, warm up the area again with a hairdryer — no need for force, patience is important.

The sequence of movement of the instrument:


Bottom of the body (near the charging socket)




Side faces (along the frames)




Top part (near the flash and microphone)




Centre (disconnection of the plume if it is glued)

Don't pull the lid too hard! After you've passed the tool around the perimeter, lift the panel slightly and visually examine the insides, and if you see the connecting plumes, you need to gently unplug or unstick them with a nail or a plastic blade.

⚠️ Warning: Never use metal blades or knives to detach the lid around the perimeter. There is a high probability of damaging the battery, which can cause it to ignite, or breaking antenna wires running along the frames.

Cleaning of the shell and preparation for installation

When you remove the old lid, you'll see the inside of the Xiaomi Redmi 9T, which will probably have some remnants of old glue and dirt left on it. The quality of future tightness depends on how thoroughly you clean that surface. Use a plastic card or nail to roll the main layers of glue into lumps.

For finishing cleaning, moisten the lilac-free napkin with isopropyl alcohol and thoroughly wipe the end of the case. Do not use water or aggressive chemicals (acetone, solvents), as they can damage the frame paint or plastic elements inside. The surface should be perfectly smooth and matte, without sticky islets.

If the new lid is already adhesive, remove the protective film immediately before installation. If the lid is "naked," apply a thin strip of B-7000 glue around the perimeter of the frame. It is critical not to apply glue to the dynamic membrane and the area of the main camera module, so that the adhesive vapors do not settle on the lenses, causing "fog" in the photos.

Installation of a new cover and fixation

The process of installing the new rear panel on the Redmi 9T requires precision and precise positioning. Combine the camera cutouts and flash with modules on the body. Make sure the plumes (if they have been disconnected) are stacked in their ducts and not clamped. Start gluing the lid to the top, gradually descending to the bottom, expelling air.

Tightly press the lid around the perimeter with your fingers. Pay special attention to the corners and areas around the camera lenses, which are where gaps most often form. If you've used liquid glue, the excess that has come out should be removed immediately before it freezes using a dry wipe or toothpick.

For the initial fixation of the device, it is recommended to use stationery rubber bands or special clips for repairing phones. Wrap the smartphone 3-4 bands across and along, ensuring uniform pressure throughout the area of the lid. Leave the smartphone in this position for at least 1-2 hours, or better - overnight, until the adhesive composition is completely polymerized.

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The quality of the lid fit is checked by holding the finger at the junction: there should be no noticeable difference in height or gap in which you can shove the nail.

Frequently Asked Questions (FAQ)