Disassembly/Repair of the mobile device Xiaomi Mi 11 Ultra (Xiaomi Mi 11 Ultra M2102K1G) with each step description and the required set of tools.

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

First of all, we need to remove the card tray. To do this, we use a special tool. We insert it into the hole and carefully push the tray out.

By the way, the tray we have - is located at the bottom.

We need to heat the surface of the back cover to a temperature of approximately 70 degrees Celsius or 160° F. For this we use a heating mat, you can use a hair dryer.

And after 5 to 7 minutes, we can move on to detach the back cover. To detach the back cover, we will use a thin plastic film. This film can be from a new display or a film from a stationery store.

Carefully insert it into the gap between the back cover and the middle cover and carefully run along the edge, cutting off the adhesive base.

So, we detached the back cover. Now we need to lift the cover up and disconnect the connector, whose cable leads to the flashlight on the back cover.

After that, we need to unscrew the seven long black screws at the top. For this we use a Phillips screwdriver one and a half millimeters or Philips #000.

Please note the screws may be different in size and color, so we recommend placing them on a special surface in a certain order to avoid confusion when reassembling.

The screws are also badly magnetic, we should also pay attention to this and maybe use additional tweezers or magnetize the screwdriver with a magnetizer.

Using a screwdriver Phillips 1.5 mm (PH #000), unscrew the two small silver screws.

And we try to detach the cover. Carefully, in the right place we pry, lift and remove the cover with an NFC.

Disconnect the two battery connectors as soon as you can. Use a non-metallic or plastic tool to avoid any damage.

ℹ️️ The Xiaomi Mi 11 Ultra M2102K1G model has a battery BM55 with a capacity of 5000 mAh (also known as a rechargeable battery).

Then we disconnect the three connectors of the three coaxial cables, connector of the inter-board cable, connector of the cable to the charging port.

And we proceed to unscrew the four long black screws at the bottom. The screwdriver is the same - Phillips 1.5 mm (PH #000)

The screws on the bottom part may also be different from each other, so it is also better to place them on a special surface and in a certain order, so that we do not confuse anything when reassembling.

Using a screwdriver Phillips 1.5 mm (PH #000), unscrew the three small silver screws.

After that we can detach the cover with antenna transmission lines. We carefully hook it over the edge, and lift it up.

As we can see on the cover, we have a loudspeaker and a small antenna board. There are also two coaxial cables attached to the cover.

It will be easier if we don't detach the cables, but disconnect the connectors of the two coaxial cables on the motherboard and carefully remove the cover with the two coaxial cables.

Carefully, preferably from the edge, disconnect the connector and remove the inter-board cable connecting the mainboard to the daughterboard (also known as the sub-board).

⚠️️ Be careful when removing the cables from the connectors, the cables are pretty thin, and it is easy enough to break them or damage the contact tracks inside.

ℹ️️ An arrow on the FFC cable (flexible flat cable) indicates its correct position.

Disconnect the connector of the under-screen cable, disconnect the connector of the inter-board cable, disconnect the connector of the coaxial cable and release the cable itself. Next, we disconnect the connector of the cable that leads to the display.

We find the right place where we can pry up and remove the sub-board.

On the sub-board we have the microphone on the edge and the card connector on the back side.

We still have to detach the charging port, to do this we carefully hook the port by the base, lift and remove the cable with the charging port.

We disconnect the connector and remove the front camera.

Using a Philips 1.5 mm screwdriver (PH #000), unscrew one screw securing the assembly of the rear cameras.

We find the right place where we can pry, gently lift and remove the motherboard. As always, it is important to find the right place where we can lift the motherboard.

⚠️️ 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.

So, we took out the motherboard and we need to disconnect the connectors of the rear cameras.

We turn the motherboard over and we need to remove the bracket on the connector.

We need to disconnect the camera connector. After that we can carefully detach and remove the assembly of the three rear cameras.

Finally, we move on to detach the battery.

It's worth reminding you that we have two brown tabs with letters, A and B. We need to pull up the outer tab with the letter A, and the tab in the middle with the letter B should be unfolded so that it doesn't interfere with us.

So, we unfold the tabs, pull the tabs that are located on the edge upwards and detach the battery.

Under the battery, by the way, we have a transparent protective coating.

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