How to open Xiaomi Poco M3: disassembly without damage

Xiaomi Poco M3 is a popular smartphone with a great price-performance ratio, but even it is not immune to breakdowns. To replace the battery, speaker or screen, you first need to learn how to disassemble it correctly. In this article, you will find a step-by-step photo instruction, a list of necessary tools and key warnings to help avoid typical errors in disassembly.

It's important to understand that the Poco M3 is not designed to be self-repaired, its body is glued together and the internal plumes are fragile. One wrong move can lead to a break in the flexible display cable or damage to the board. If you've never disassembled a smartphone before, we recommend you practice on an old device or contact a service center first. However, if you are confident in your abilities, follow our recommendations.

Preparation for disassembly: tools and security measures

Before you open the Xiaomi Poco M3, prepare your workspace and tools.

• 🔧 Plastic mediators (2-3 (S) for a careful sleeve of the lid.
• 🔨 Screwdriver. T3 and T4 — screw-hole.
• 🧲 Magnetic mat or container – to avoid losing small details.
• 🔥 Hair dryer or thermo-air station - for softening the glue (optional).
• 📱 Screen suction cup – will help separate the front panel (if required).

Also, do not forget about the safety measures:

• ⚡ Turn off your smartphone and remove it. SIM-memory-card.
• 🔋 Discharge the battery before 25-30% — This will reduce the risk of fire in case of accidental closure.
• 🧤 Use an antistatic bracelet or touch a grounded object periodically.

⚠️ Warning: Do not use metal tools to lid the lid! They can leave scratches on the body or damage the internal components. Plastic mediators or guitar mediators are the best choice.

If you don't have experience, heating the body with a hairdryer to 60-70°C will make it much easier to separate the back cover, as the glue becomes more elastic. However, don't overheat the device - it can damage the battery or display.

Step 1: Removing the back cover

The back cover of the Poco M3 is glued around the perimeter, so it must be carefully separated, starting from the most vulnerable places.

1. Place the smartphone down on a soft surface (such as a napkin).
2. If you use a hair dryer, evenly warm up the edges of the body for 1-2 minutes.
3. Insert a plastic mediator into the gap between the lid and the middle frame at the Type-C connector - here the glue is least.
4. Carefully drive the mediator along the edge, gradually detaching the lid. If you feel resistance, heat the place up a little with a hairdryer.

Do not try to tear the lid off with a sharp movement - under it there are plumes of the fingerprint scanner and NFC-If you damage them, the functionality of the smartphone will be disrupted.

⚠️ Warning: If the lid is not amenable, do not use excessive force. Warm up the problem area with a hairdryer again. Too much pressure can lead to cracks in the plastic or damage to the internal components.

Step 2: Shutting off the battery

Once the lid is removed, the first thing you need to do is turn off the battery to avoid short circuits. In the Poco M3, the battery connector is located at the bottom of the board and is closed with a black protective film.

Instructions for unsetting:

1. Carefully slap the film over the battery connector (it is weakly glued).
2. Use a plastic pickup or tweezers to lift the battery plume from the connector.
3. Check with a multimeter that there is no voltage on the board contacts (optional, but recommended).

If the plume is not amenable, don't use force -- it's probably glued -- in which case, gently stick it on the side with a thin tool.

Once the battery is turned off, you can start disassembling it further, but remember that every connector on the board is fragile, and damage to it can lead to expensive repairs.

Step 3: Dismantling the motherboard and other components

The Poco M3 motherboard is mounted on multiple screws and connected to other components through plumes, and to remove it, do the following:

1. Unscrew all the T3 screws around the perimeter of the board (there are about 10-12 pieces), fold them in a magnetic container so as not to confuse them.
2. Carefully unplug the plumes: 📱 Display (the widest, at the top of the display). 🔊 Lower dynamics (thin black plume). 📷 Main camera (if you need to replace it).

Put a plastic blade on the board and gently lift it up. Don't pull around the corners, because there are fragile elements in there.

If you only need to replace the battery or the speaker, you don't have to remove the board, but you have to remove it to access the charging connector or audio connector.

💡

Before removing the board, take a picture of the location of all the plumes and screws. This will help to properly assemble the smartphone back and avoid “extra” parts after repair.

Step 4: Replace the battery (Step-by-step)

The battery in the Poco M3 is glued to the body, and it takes care to replace it.

1. After disconnecting the battery from the board, find a traction band (usually black or yellow) under the battery.
2. Carefully pull the tape to separate the battery from the glue layer. If there is no tape, use a plastic shoulder blade while putting the battery on the edge.
3. Don't bend the battery or puncture it! Lithium polymer batteries can ignite if damaged.
4. Install a new battery after cleaning the installation site of glue residues. Use double-sided tape or special glue for fixation.

If after the assembly of the smartphone does not turn on, check:

1. Are all the plumes connected (especially the battery and display)?
2. Are there any circuits on the board (look for blackened components).
3. Is it properly installed? SIM-map (sometimes it interferes with inclusion).

⚠️ Warning: If the battery is switched on after the battery is replaced, but discharges quickly, check the status of the connector contacts. Sometimes they become oxidized or contaminated, leading to poor contact. Clean them with alcohol and a soft brush.

Assembly of a smartphone and checking the performance

The Poco M3 should be assembled in reverse order, and here are the key points:

1. Make sure all the plumes are connected to the end (click should be heard).
2. Twisting the screws in the same sequence, without putting unnecessary effort.
3. Before installing the back cover, check the performance: 📞 Calls and microphones. 📷 Cameras (main and front). 🔋 Charging (connect the cable and make sure it is charging). 🔊 3.5 mm speakers and connector (if any).

Apply new glue to the lid or use double-sided tape to fix. Warm the edges with a hair dryer (40-50°C) and press the lid tightly.

If something doesn’t work after assembly (for example, the sensor doesn’t react or the camera doesn’t turn on), take the smartphone apart again and check:

• 🔌 Connecting the plumes (possibly they are not fully inserted).
• 🛠️ Integrity of contacts (whether there is contamination or oxidation).
• 🔧 Correct installation of screws (extra screw can close the board).

If the problem persists, it's likely that one of the components was damaged during the dismantling, in which case you should contact the service center.

FAQ: Frequent questions about the dismantling of Xiaomi Poco M3