Disassembly/Repair of the mobile device Xiaomi Poco M7 4G (Xiaomi POCO M7 4G 25062PC34G) with each step description and the required set of tools.

⚠️️ Before disassembling, do not forget to turn your phone off.

First, we need to remove the SIM card tray.

We use a SIM eject tool, insert it into the hole, and gently push the tray out.

Next, we need to heat the back cover to approximately 70°C (160°F). We're using a heating mat, but you can also use a heat gun or a hair dryer.

After about 5 to 10 minutes, we can begin separating the back cover. We use a thin plastic film, carefully insert it into the gap between the back cover and the midframe cover, and slowly work our way around the edge, cutting through the adhesive.

As always, be especially careful around the camera module, since the camera lenses are located in this area. Take extra care not to damage them.

Also, don't insert the plastic film or any other tool too deeply under the back cover, because we don't know what components are located underneath.

Please note that the back cover is also additionally glued around the camera area. Here, you can use a small tool to gently lift the cover and separate the adhesive in that section.

As you can see, there are no components attached to the back cover.

Next, it's a good idea to protect the camera lenses. We use a protective film for this.

Please note that the film should be applied to the rim around the lenses, not directly onto the lenses themselves.

Now we can remove the screws from the upper section. We use a Phillips #000 (1.5 mm) screwdriver.

. If a screw is difficult to remove or gets stuck, we can use tweezers and, of course, a magnetic screwdriver or a magnetizer.

Next, remove the screws from the lower section.

It appears that all of the screws are identical. However, it's still recommended to arrange them on a magnetic mat or another organizing surface and reinstall each screw into its original location, since screws don't always thread properly into different holes.

Now we can remove the midframe cover.

First, use a thin plastic film and insert it into the gap between the midframe cover and the display frame near the SIM card tray opening. Release a few clips, then switch to a thicker plastic opening tool.

As always, be careful around the corners because the cover is held very tightly there.

Also be careful around the edge of the display to avoid accidentally damaging it, since it is very fragile.

Carefully lift the midframe cover, then use a non-metallic tool to disconnect the battery connector.

ℹ️️ The Xiaomi POCO M7 4G 25062PC34G uses a BN70 rechargeable battery with a capacity of 7000 mAh.

Next, disconnect the fingerprint sensor connector and remove the midframe cover.

The midframe cover contains the fingerprint sensor, contact pads, and antenna traces.

Here we need to remove the loudspeaker cover, which is secured with clips.

Carefully release it at the correct point, lift it up, and remove it. As you can see, the loudspeaker is integrated into this cover.

Next, disconnect the coaxial cable connector, disconnect the interconnect flex cable connector, and peel back the heat-dissipating film from the vibration motor.

Now we can remove the sub-board.

Carefully lift it from the correct point and remove it. The sub-board is also held in place with clips.

It contains the charging port, microphone, and other components on the opposite side.

Now we can disconnect the interconnect flex cable connector, disconnect the display flex cable connector, and disconnect the coaxial cable connector.

And we can remove the rear cameras. Carefully lift them by the edge and set them aside.

We can also disconnect the front camera.

It's best to keep the copper heat-dissipation film attached to the front camera, since we'll need it during reassembly.

It's also a good idea to cover the front camera to prevent dust or debris from getting onto the lens.

Before removing the motherboard, make sure that nothing else is holding it in place.

Now we can carefully lift and remove the motherboard.

Keep in mind that it may also be lightly held in place by thermal paste on the opposite side.

Finally, we move on to removing the battery.

As is typical for large POCO batteries, there are brown pull tabs on both sides labeled A and B.

One set of tabs needs to be folded back, while the other tabs should be pulled carefully upward.

Pull upward on the tabs located along the edges to release the battery.

Under the battery, there is a transparent adhesive film that protects the interconnect flex cables.