Redmi series smartphones have been hugely popular for many years due to the successful combination of performance and affordable price. However, despite the reliability, any electronic device will require maintenance or repair over time. Often users face the need to replace broken glass, worn-out battery or a failed charging connector. Owners of the Xiaomi Redmi Note 2 (Prima) model are no exception and often wonder about self-interference in the design.
Disassembling this device requires a certain skill and understanding of the architecture of the smartphone, as it has its own design features. Wrong actions can damage the plumes or the body, so it is important to act consistently and carefully. In this article, we will discuss the dismantling process in detail, highlight the key points and point out the potential risks that you may face.
Before any work begins, you need to prepare the workplace with good lighting and no static electricity. It is also crucial to have a specialized tool at hand to avoid scratches and chips when opening the case. If you have never repaired mobile equipment, carefully study each step described below to prevent critical errors.
Tools and workplace preparation
The success of any electronic repair operation depends on 80% on the quality of preparation. To disassemble the Xiaomi Redmi Note 2, you will need a minimal but specific set of tools that can be purchased from any radio parts store or marketplace. The use of improvised tools such as knives or pins is strongly discouraged, as they can easily damage internal components or scratch the frame.
First of all, you need to get a set of screwdrivers. For this model, the most important cross screwdrivers are the size of the PH000 and PH00, since these are the screws that attach the main board and other elements. You may also need a flat screwdriver to carefully snap some latches, but you need to use it with extreme caution.
Plastic spatulas and mediators are essential for screen and battery use. Metal tools can cause permanent damage to the display, so all contact with the screen should be done through plastic only, and you can also use a suction cup to lift the display and tweezers with curved ends to work with small parts.
- 🔧 Precision screwdriver kit (cross-hatch) PH000, PH00 flat).
- 📱 Plastic blades and mediators for opening the body.
- 💨 Suction cup for careful lifting of the display module.
- 🔥 A hair dryer or thermophen to soften the glue (if the screen has changed previously).
- 🧲 Magnetic mat or organizer for sorting screws.
The space is a big concern, and all the screws in the Redmi Note 2 are of different lengths and threads, and if you mix them up when you build them, you can damage the thread in the landing holes, or even punch through the motherboard, and you can either arrange the screws in the same order they were twisted, or use a magnetic map.
Primary dismantling: Removal of the back cover and battery
The disassembly process starts with the most obvious but important step, which is the removal of the back cover. Unlike more modern models, it's removable, which makes it much easier to access the main nodes. But there's a nuance here too: the locks can be tight, especially if the phone hasn't been opened in a long time.
First, you need to remove the tray. SIM-This is a standard procedure that avoids accidental damage to the contacts when the body is pressed, and then flip the smartphone down and find a small cutout in the corner of the back cover designed to remove it.
⚠️ Warning: Do not try to cover with nails or sharp metal objects in any place, as this will lead to chipping on the plastic and loss of the product appearance of the device.
Carefully tuck the angle of the lid with a plastic blade or a mediator. Move along the perimeter, gradually snapping the plastic locks. Don't use excessive force: if the lid doesn't lend itself, check if the lock is left unclicked. Once the lid is removed, you will have access to the battery and the frame screws.
The next critical step is to cut the power, and before you touch any plumes or boards, you need to disconnect the battery plume from the motherboard, and this is done by carefully tweaking the connector with a plastic blade, and ignoring this step can short circuit and cause the power controller to fail.
☑️ Pre-commencement checks
Once the battery is turned off, you can unscrew all the visible screws that attach the plastic frame (the middle part of the body) to the main structure, and their number can vary depending on the modification, but usually there are about 10-12 pieces around the perimeter and in the center.
Removal of the display module and frame
The most difficult stage of dismantling Xiaomi Redmi Note 2 is the separation of the display module from the metal frame. the screen is glued around the perimeter with a special adhesive composition, which over time can harden or, conversely, spread out when heated.
If you're changing the screen for the first time, the adhesive may still be quite elastic, but if the device has already been repaired, you'll need pre-heating. Use a hair dryer or thermophene to heat the screen perimeter to 60-80 degrees Celsius, which will soften the adhesive and allow the module to be removed without damage.
Insert a suction cup at the bottom of the screen, closer to the navigation buttons, and pull up slightly to create a gap. Insert a thin plastic blade into the resulting gap, gently drive the tool along the faces, cutting the adhesive layer, do not plunge the blade too deep so as not to touch the plumes or matrix.
- 🌡️ Warm up the edges of the screen evenly without holding the hair dryer in one place.
- 🛑 Do not press the center of the matrix to avoid spots or cracks.
- 🔪 Move the shoulder blade smoothly, feeling the resistance of the glue.
When the adhesive layer is overcome, you can gently lift the module, but don't be in a hurry to remove it completely, because the plumes that go to the control board come to the bottom of the display, and a sharp jerk is guaranteed to cause the plume to break, making the module unusable.
What to do if the screen cracks when you shoot?
Once the display plume and touchscreen are turned off (if it goes separately), the module can be fully removed, and you now have access to a metal frame that serves as the framework for all the electronics of the smartphone.
Access to motherboard and components
The motherboard in Redmi Note 2 is located at the top of the case and is closed with a metal screen, which also acts as a radiator. To access the main components, you need to remove this screen, which is held on screws and possibly on adhesive basis.
Turn out all the screws that hold the top of the structure. Notice the plumes that can pass under the metal plates. Often the plume of the front camera or proximity sensors can be hidden under the mounts, and they need to be carefully sidelined before the board is completely removed.
| Component | Location. | Features of withdrawal |
|---|---|---|
| Maternity fee | Upper part | Requires a shutdown of 3-4 plumes |
| Charging charges | The bottom part | Fastening screws to the frame |
| Main camera. | Centre de la carte | Sitting tight, needing a neat underdog |
| Dynamician | Lower end | It has a rubber sealer. |
When removing the motherboard, be careful about the antenna connectors. In some versions, the antenna cable can be laid through special channels in the frame. If you feel resistance when trying to raise the board, check if any cable is caught.
⚠️ Attention: Motherboard is the most sensitive element. Avoid touching contacts with your fingers, as fat and static electricity can disrupt the chips.
Once you've removed the board, you get full access to the insides of the device, and you can now replace the vibrator, speaker, speaker, or lower board with microphone, all of which are modular and easily changeable elements in the Xiaomi Redmi Note 2.
Replacement of the battery and lower board
The battery in this model is glued to the body quite firmly, but not as strongly as in modern monoblocks. It is convenient to use a plastic card or a special blade with a cutout to remove it, sliding it down from the bottom and gently moving it, trying not to damage the shell.
If the battery is swelling, you should work with extreme care not to puncture the shell and cause fire, in such cases, it is recommended to first slightly tear the shell in a safe place and pour inside a little alcohol or adhesive solvent to reduce adhesion.
The lower board, where the Micro-USB charging connector is located, is attached with several screws to the plastic frame. Before removing it, you need to turn off the main train from the motherboard and the touchscreen plume if it passes through this area.
When installing a new battery, make sure the connector sits tightly in the connector. Insufficient contact can cause the phone to not see the battery or show an incorrect percentage of charge. After installing all components, perform an initial check of the device before final assembly.
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Use double-sided tape or a special B-7000 glue to fix the new battery so it doesn’t hang around inside the case when in use.
Assembly of the device and verification of functionality
The Xiaomi Redmi Note 2 is built in reverse order, but it has its own nuances. The main rule is not to twist the screws to the end at once. First, make all the screws, make sure that all the parts fall into place, and only then tighten them.
Pay special attention to the plume of the display. When connected, it should stand with a characteristic click. If the connector is crooked or not completely, the screen may not work or work with artifacts. Once the plume is connected, you can temporarily turn on the device without screwing the lid to check the image and touch.
When you install the back cover, make sure that all the locks are intact. If some of them break when you disassemble, the cover may not sit tight and slug, in which case you can carefully drop some glue on the edges, but you better try to do with mechanical fixation.
- ✅ Check the operation of all buttons (volume, on).
- ✅ Make sure the proximity sensor and front camera work.
- ✅ Check the charging and operation of the speakers.
- ✅ Make sure there is no gap between the screen and the body.
The final stage is the installation SIM-If the network is stable and Wi-Fi and Bluetooth are running smoothly, the repair is complete.
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Quality assembly depends not on the force of screw twisting, but on the correct stacking of plumes and the absence of skewed body.