Smartphone Xiaomi Redmi 9T has established itself as a reliable device with an impressive battery, but even the highest quality equipment over time requires intervention. The need to open the case can arise for various reasons: from the banal replacement of a broken display or a worn-out battery to cleaning the speaker from dust or repairing the charging connector.
The process of disassembling this model has its own technological features that distinguish it from other devices in the line of Redmi Note or Mi. It uses a special design of the rear cover and the location of the plumes, which requires care when dismantling. Any careless movement can damage fragile components, so it is important to prepare the workplace in advance.
In this article, we will take a closer look at each step of opening the case, with a focus on hidden screws and thin plumes, which tools are needed to work safely and how to avoid the common mistakes that beginners often make when first contacting mobile electronics.
Tools and workplace preparation required
The use of inappropriate items such as kitchen knives or needles often damages plastic latches or the case. To work with the Redmi 9T, you will need a specialized kit that minimizes risks.
Special attention should be paid to the heating element. The glue that holds the back panel, under the influence of time, polymerizes and becomes very hard. Without high-quality heating, there is a high risk of breaking the glass or deforming the frame when trying to lid.
- 🔧 A set of precision screwdrivers (mandatory presence of bits) PH00 and T5)
- 🔥 Hair dryer or heating pad for softening glue (temperature not higher) 80-90°C)
- 💳 Plastic blades and mediators for opening the body
- 🧲 Magnetic mat or organizer for screws
- 🧤 Antistatic gloves and glass suction cup
The workspace should be well lit. It is recommended to use a bright desktop lamp that does not create glare on the glossy surfaces of the smartphone. It is also important that there are no extra items on the table that may accidentally fall into the device being dismantled.
⚠️ Warning: Before starting any work, be sure to turn off the smartphone. Attempting to disconnect the plume of the display or battery when the device is on can lead to a short circuit and failure of the power controller.
Prepare the screw sorting containers. Xiaomi Redmi 9T uses screws of different lengths and diameters, and if you mix them up when you build them, you can damage the thread in the board or you can break through the body, which is a critical mistake.
Dismantling of the back panel and tray SIM-map
The first step in the Redmi disassembly process 9T is the extraction of the tray for SIM-It's standard procedure, but it's necessary to prevent pressure on the frame when you heat it up. Use a paper clip or a special key that's included in the delivery.
Heating the back cover is the most critical part of the initial phase. The adhesive layer runs around the perimeter of the device. Warm the surface evenly with a hairdryer, constantly moving it so as not to overheat one point. The optimal warming time is 2-3 minutes.
After warming up, place the suction cup at the bottom of the back cover, closer to the center, but avoiding the camera area. Pull the suction cup up, creating tension, and insert a plastic mediator into the resulting microscopic slit. Do not use metal tools at this stage so as not to damage the glass.
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If you don't have a hair dryer on hand, you can use a sealed hot water bag (about 80 degrees) and apply it to the back cover for 5-7 minutes, a gentler but longer method.
Move the mediator along the perimeter, cutting through the adhesive layer. Be especially careful in the corners and in the area of the main camera module, where the adhesive can be applied more tightly. If the lid does not move, do not use force - you better warm up the device again.
After passing through the perimeter, the back panel should be easily separated, but do not rush to remove it completely. Inside, there may be thin plumes or antenna contacts that require careful handling, put the removed panel on the outside side down on the soft fabric.
Removing protective screens and disabling plumes
When you take the back cover off, you'll see the interior of the smartphone, and the battery takes up most of the space, and at the bottom is a motherboard that's covered with a black safety plate, and that's where the electronics start.
The protective plate is mounted with multiple screws, and the number and location of the screws can vary depending on the board revision, but usually there are about 10-12 screws, and all screws must be twisted counterclockwise and folded into a separate cell of the organizer.
| Component | Type of screw | Number of | Location. |
|---|---|---|---|
| Protection fee (low) | Small crosses | 10-12 pcs. | Perimeter of the charge |
| Dynamics (bottom) | Cross-middles | 2 pcs. | At the bottom of the hull |
| Antenna module | Small crosses | 2 pcs. | In the corner by the camera |
| Battery attachment | Specific | 2 pcs. | Under a plastic frame |
When you take off the plate, you'll see the plume connectors, which can be covered with additional plastic plugs or metal clipping slats, and carefully remove them if they're present using a plastic blade.
Turning off the plumes requires delicacy. Put your connector up with your nail or plastic tool from the bottom up. Don't pull the plume on the bottom of the pin, it will cause it to break, and the battery plume will shut down first, then all the other peripheral connections.
☑️ Procedure for disconnecting plumes
Removal of the battery and replacement of components
The Xiaomi Redmi 9T has a massive battery pack that takes up a significant portion of the interior, glued to the frame in two strips of double-sided tape, and requires reheating to retrieve it.
Turn on the device (if it was turned off for transportation) and warm up the back of the case in the battery area. The temperature should be comfortable for the hand, but sufficient to soften the glue. Overheating of the lithium polymer cell is unacceptable and dangerous!
Use a plastic card or a special blade with a notch to smack the edge of the battery. Move the tool parallel to the plane of the body, trying not to damage the battery shell. If the battery is swelling, act with utmost care not to puncture it.
⚠️ Warning: Damage to the battery shell can cause ignition or chemical burns. If you notice bloating, do not press the battery and do not try to prick it to check.
Once the old element is removed, clean the seat of glue residues. Use isopropyl alcohol or a special adhesive solvent that does not contain aggressive components. Stick new adhesive tapes on the low-fat surface before installing the new battery.
If your goal was to replace other components, such as a vibrator or a lower speaker, now is the time to do so. These modules in the Redmi 9T are located at the bottom of the body and are often hidden under additional safety nets or films.
How to safely dispose of an old battery?
Removal of the display module
Replacing the screen is one of the most difficult operations. The Xiaomi Redmi 9T uses In-Cell or similar technology, where the touchscreen and the matrix can be sold into a single block with a frame. Often the module is sold in a frame, which makes it easier to replace.
To remove the display, you need to completely free the body of all internal components, including the motherboard. The board is mounted with screws and sits neatly in its guides. Before extracting, make sure that all plumes are turned off and the antennas are free.
The motherboard is removed from the charging connector side, and you need to carefully lift it, make sure that any microphone or antenna wire is caught, and you put the board on the antistatic mat with the outside up.
Now, the body is an empty frame with a glued display. Again, apply heat around the perimeter of the screen. Be careful: when you get too hot, the LCD matrix can leak or change color. Move a thin line or a special opening knife between the frame and the glass.
- 📱 Warm up the screen perimeter with a hairdryer during 3-4 minute
- 🔪 Carefully walk the instrument around the perimeter
- 🧹 Remove the glue residue from the frame before installing the new module
- 🧪 Degrease the frame with alcohol for better adhesion
A new display module usually already has a layer of adhesive applied. Remove the protective film and carefully frame the module starting from one of the long sides. Press the perimeter evenly for fixation.
Assembly of the device and verification of functionality
The assembly is done in reverse order, but requires no less concentration. The main task is to properly stack all the plumes and not damage them when installing protective plates. In Xiaomi Redmi 9T, the space inside is quite dense.
Start by putting the motherboard in place. Make sure it's seated in its seats without any skewing. Twisting all the mounting screws, but don't tighten them to the end at once -- you'd better go around in a circle, twisting each screw half a turn.
Connect the plumes. First, the display plume, then the battery, and then the battery, the screen should light up. If there's no image, check the density of the connector, and sometimes you need to turn it off and reconnect it.
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Checking the health before fully assembling the body is the golden rule of repair. Make sure the sound, touchscreen, cameras and charging work while you have access to the insides.
Set the bottom protective plate and twist all the screws. Make sure that no screws are left behind. Then install the battery (if it's been removed) and glue it to new tapes. The final step is to install the back cover.
Put a new glue loop on the frame of the case. Put the back cover on the camera holes and flashes, then press the perimeter evenly. For better fixation, you can use stationery gums, wearing them on the body for 15-20 minutes.
What if the phone does not turn on after assembly?
Can I use adhesives instead of special tapes?
Do I need to reset the settings after changing the screen?
The final check should include testing all the features: volume, vibration, both cameras, proximity and light sensors, and make sure that the speaker is not dusted and the buttons are pressed with a clear click.
High-quality disassembly and assembly Xiaomi Redmi 9T will prolong the life of your device and save money on the services of the service center. the main thing is not to rush and follow the instructions, paying attention to every detail of the process.