Disassembly/Repair of the mobile device Xiaomi Redmi 14C (Xiaomi Redmi 14C 2409BRN2CY) with each step description and the required set of tools.

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

As usual, the first thing we need to do is remove the SIM card tray.

To do this, we use a special tool, insert it into the hole, and gently push out the tray.

Next, we need to heat the surface of the back cover. For this, we’re using a heating mat, but a hair dryer will also work.

We heat it to approximately 70 degrees Celsius, or about 160 degrees Fahrenheit.

After 5 to 10 minutes of heating, we can start removing the back cover.

To separate the back cover, we use a thin plastic film. This can be a protective film from a new display or a plastic film from an office supply store. We carefully insert it into the gap between the back cover and the midframe, then gently slide it along the edge to cut through the adhesive.

With this model, you need to be especially careful around the camera area, since the cover is more securely glued there. Take your time detaching the cover near the cameras to avoid touching or damaging the camera lenses.

Also note that the area around the flash is glued as well, so be mindful of that.

Next, we cover the camera lenses using a special protective film.

Be sure not to press the film directly onto the lenses—only onto the surrounding ring (rim) around each lens.

And we move on to unscrewing the screws. For this, we use a 1.5 mm Phillips screwdriver (or a Phillips #000).

Place the screws on a dedicated surface. It's best to keep them in order, just in case, as screws can sometimes be hard to screw back into the wrong holes.

Don’t forget to remove the seven screws at the bottom of the phone too.

Even though they appear identical, it’s a good idea to keep them separate.

After removing all the screws, we move on to detaching the midframe.

First, we use a thin plastic film to release a few clips around the SIM tray area. Then we switch to a thicker tool and run it along the edge.

Always be careful around the corners—this is where the cover holds on the tightest, and it’s easy to accidentally damage the edge of the display.

Also, pay attention to the area around the fingerprint sensor and side buttons, since those components are physically located there.

We gently raise it and flip it over to avoid damaging the fingerprint sensor cable.

Using a non-metallic tool, we disconnect the battery connector.

And then we disconnect the fingerprint sensor cable connector, and set aside the midframe with the antenna contact pads.

Now we move on to the lower part of the phone.

We remove the speaker module—find a suitable spot where you can lift it easily, then take it out and set it aside.

Then we disconnect a few connectors. We detach the inter-board cable connector, and the coaxial cable connector.

After checking that there are no screws holding anything in place, we can proceed to remove the sub-board.

Be aware that it may be clipped in, so take your time prying it loose.

The sub-board sits slightly recessed inside the frame.

It houses the charging port, microphone, and several other components on the underside.

Next, we disconnect the connectors.

We unplug the display’s inter-board flex cable and the coaxial cable connector.

We can carefully disconnect the rear cameras—lift them gently and set them aside.

Then we disconnect the front-facing camera. As usual, the front camera is attached to the shield on the motherboard with copper thermal foil. It’s best to peel this off carefully, so we can reuse it during reassembly.

We also cover the lens of the front-facing camera to prevent dust from getting in.

After confirming there are no screws holding the motherboard in place, we carefully lift it at the right spot and remove it.

There is no need to use a lever or try to reach the circuit board by force. Make sure that nothing is getting in the way or holding the circuit board.

The motherboard, also, may be attached with attachments like latches or hooks, be careful.

⚠️️ Do not bend the circuit board when removing it or push tools under it. Unbeknownst to yourself, you can damage components or cables from the inside.

Finally, we move on to removing the battery.

As always, we read the instructions printed on the battery tabs to see the correct order and method for removal.

According to the instructions, we need to fold both tabs outward.

The small tab in the center should be folded out and held firmly, while the wide tab in the middle needs to be pulled upward gently to release the battery.

Underneath the battery, there’s a transparent adhesive film that protects the inter-board cable.

ℹ️️ In the display frame remained: the earpiece speaker, vibration motor, and side buttons.