Modern smartphones, including the popular Xiaomi Poco X3, are designed with a monolithic body, which creates serious difficulties when trying to independently access internal components. Users often face the need to replace broken display glass, install a new battery or clean the device of moisture, in these cases, the question of how to safely open the back cover becomes critical.
The process of disassembling the Poco X3 NFC and the Pro version requires not only special tools, but also an understanding of the structure of the adhesive joints. The rear panel is glued around the perimeter, and the heating must be uniform to avoid deformation of the frame. In this article, we will detail each step necessary to safely open the case, paying special attention to hidden screws and fragile connectors.
Before you start, make sure you have a good lighting and antistatic workspace, and the absence of dust and static electricity significantly reduces the risk of electronic damage. Next, we’ll look at the hardware you need and the steps you can take to open your smartphone without fatal errors.
Preparation of the workplace and necessary tools
The quality disassembly of any gadget begins with the preparation of an arsenal of tools. For the Poco X3 model, a standard set of screwdrivers will not be enough, since the design of the device involves the use of specific suction cups and mediators. The main enemy at opening is glue, so you can not do without a heat source such as a hair dryer or a heating panel.
You'll need a set of precision screwdrivers that includes PH00 and PH000 cross bits, which are the sizes used to twist motherboard screws and shields, and a metal blade or scalpel for cutting the adhesive layer carefully will be an indispensable tool, but you need to use them with extreme caution.
- 🔥 Hair dryer or heating station for softening the adhesive around the perimeter of the housing.
- 🛠️ A set of precision screwdrivers (cross and flat) for screws of different caliber.
- 📱 Plastic mediators and suction cup for safe separation of the back cover.
- 🧲 Magnetic mat or organizer for sorting screws of different sizes.
⚠️ Attention: Use of a common household hair dryer may not be effective enough if the glue has long been polymerized. 80-90 degrees, controlling heating with the thermometer so as not to damage the display matrix from the back side.
Special attention is paid to the organization of space. The screws in Xiaomi Poco X3 have different lengths and threads, and their entanglement can damage the internal components or the inability to twist the lid back. It is recommended to use a magnetic mat with markings or simply lay the screws in order of their extraction on a sheet of paper with signatures.
Primary stages: extraction SIM-maps and back cover removal
The first step before opening Poco X3 pro NFC version, is the extraction of the tray SIM-This is an action that you need to take to access one of the hidden screws, which is deep inside the tray shaft, and if you skip this step, you just can't remove the bottom plastic panel that hides the main fasteners.
Once the tray is removed, you need to warm up the perimeter of the back cover. The adhesive composition used by the manufacturer is strong enough, so the warm-up should last about 2-3 minutes. Move the hair dryer around, paying special attention to the corners where the glue concentration is usually higher. Don't keep the hair dryer at one point for too long so as not to overheat the battery.
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Warm the body evenly around the perimeter, making circular movements with a hairdryer. Local overheating at one point can lead to yellow spots on the screen or damage to the oleophobic coating.
When the body is sufficiently warmed, place the suction cup at the bottom of the back, just above the logo. Pull the suction cup up, creating tension, and in the resulting gap, carefully insert a plastic mediator. Drive the mediator along the edges, gradually cutting through the adhesive layer. Metal tools at this stage are best not used, so as not to damage the glass.
Be very careful in the top of the smartphone, where the main camera module is located. Here the gap between the lid and the frame is minimal, and the risk of damage to the lenses or plumes is very high. Move slowly, feeling the resistance of the glue, and if necessary add a little more heat.
Dismantling protective slats and disconnecting plumes
When you successfully remove the back cover, you'll see the inside of your smartphone, but you can't pull the battery or the display right away, and you can't get to the main components with plastic and metal safety strips that are fixed by a lot of screws, and the Poco X3 has a very complex mounting system that requires careful attention.
First of all, you need to unscrew the screws that hold the bottom plastic cap that covers the charging connector and speaker. Note that one of the screws can be hidden under a sticker or rubber plug. Once the bottom is removed, you will access the charging port plume and the main display plume.
| Component | Type of screw | Number of | Location. |
|---|---|---|---|
| Lower bar. | PH00 (black) | 5 pcs. | Along the lower edge |
| Battery protection | PH000 (silver) | 2 pcs. | Over the AKB connector |
| Screen (connector) | PH000 (silver) | 1 pc. | metallic brace |
| Fee (main) | PH00 (black) | 3 pcs. | Perimeter of the charge |
The next step is to turn off the plumes, and before you take the metal screens off the motherboard, you have to turn off the battery, which is a critical step to prevent short circuits when you're working with other connectors, and use a plastic blade to snap the battery connector.
Only after the power out is the display plume and touchscreen removed, and these can be fixed with additional metal staples that also need to be carefully unscrewed, so don't pull the plumes sharply, make sure they're glued to the frame.
☑️ Safe shutdown of plumes
Removal of the battery and work with adhesive connections
Replacing the battery in the Xiaomi Poco X3 is one of the most common causes of disassembly, as battery capacity decreases over time, but it is the most difficult to remove it because it is glued to the frame on double-sided tape throughout the area.
For safe extraction, it is recommended to warm up the back of the smartphone, where the battery is located, or use a special adhesive solvent (for example, B-7000 or isopropyl alcohol), injecting it with a thin syringe under the edges of the battery. After softening the adhesive, use special plastic cards or a thin line to “resaw” the adhesive layer.
⚠️ Warning: Metal tools are strictly forbidden to use to smack the battery.Puncture of a lithium polymer battery causes an instant chemical reaction with the release of toxic smoke and open flames.
If you plan to install a new battery, prepare new adhesive strips in advance. Use of old glue or tape is unacceptable, as this will lead to backlash of the battery and possible damage to the plumes when the device falls. Carefully clean the frame of the residues of old glue with alcohol and degreasing.
When installing a new battery, make sure the connector is properly positioned and not squeezed. After connecting the battery, do not rush to close the case - first check if the device is switching on and whether the touchscreen is reacting.
What to do if the battery is swelling?
Replacement of the display and the touch screen module
Broken screen is another common problem. In the Poco X3, the NFC display is a module where the matrix and the touchscreen glass are glued together, which makes it easier to replace, since you don't have to mess with the separation of the glass, but you need to be careful when disconnecting the plumes.
To replace the display, you need to remove the motherboard completely, as the screen plume runs underneath it, a time-consuming process that requires you to turn off all antenna cables, vibrator motors and cameras. Remember or photograph the location of each screw, as their length can vary by fractions of a millimeter, which is critical for the board.
After removing the board, carefully separate the old display from the frame, warm up the perimeter. The new module before installation, it is advisable to check, simply by connecting the plumes and turning on the phone, without permanently gluing it. Make sure that there are no broken pixels and the sensor works correctly.
- 📸 Take a picture of the antenna wires before removing the board.
- 🔌 Check the integrity of connectors on the new display before installation.
- 🧪 Test the touchscreen and image before the final assembly of the body.
When you build, make sure that the plume of the display lay flat, without clamps. Often, problems with the "dead zones" of the touchscreen after repair are due to improper stacking of the plume or the presence of dust under the connector.
Assembly of the device and checking leakage
The final step is to build your smartphone, which requires as much precision as disassembly. Before you stick the back cover, check all the functions: cameras, speakers, microphones and proximity sensors. Make sure all the screws are swirled into place, especially those that hold the motherboard.
To restore the leakage (at least partial) you need to apply a new layer of glue around the perimeter of the back cover. Use a special electronics glue that remains elastic after drying. Apply it with a thin continuous line, avoiding getting into cameras and sensors.
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Quality assembly depends on the purity of the adhesive surfaces. Carefully remove all remnants of old glue from the frame and lid, degrease them, otherwise the new sticker will not hold, and the smartphone will creak or pass dust.
Once the lid is glued, lock the smartphone with rubber bands or place it under a small press for 1-2 hours until the glue is completely dry. Don't turn the device on immediately, let the chemical processes complete. After drying, wipe the case and check the density of all the elements.
If you do everything right, your Poco X3 will be a quick ride again, but remember that disassembling yourself takes away the official warranty, so weigh the risks before you start.