Teardown difficulty:
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Disassembly/Repair of the mobile device Xiaomi Mi 9T (Xiaomi Mi 9T M1903F10G) with each step description and the required set of tools.


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How to disassemble Xiaomi Mi 9T, Step 1/1 How to disassemble Xiaomi Mi 9T, Step 1/2

Step 1. Remove the tray

Use the ejection tool (aka Needle) or Paperclip. Push the tip all the way into the hole until the tray ejects, and then pull the tray of SIM and Memory card (Micro SD) out.

⚠️️ Pay attention! The tool must be inserted into a hole on the edge of the phone's housing. Do not press too hard. It may break the tray eject mechanism.


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Step 2. Open the back cover

We recommend using a special heating device such as a separator machine, heat gun, or heating mat. It will simplify the process. You can use a home hairdryer, but you will have to make a nozzle by hand or have a suitable one in the kit to gently heat and concentrate the heat flow in the right place.

ℹ️️ The surface of the back cover must be heated to soften the adhesive underneath. The approximate heating temperature is 50° C / 125° F.

Use a thin plastic film or pick for separation. To facilitate the process, you can use isopropyl alcohol. It is often most difficult to pass the tool between the parts to be divided. Choose the far edge from the FFC cables or buttons.

Do not use a lever or any force for separation that could damage the elements inside.

Do not let the liquid get inside the smartphone.


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Step 3. Screw in one screw

Using a screwdriver (Phillips 1.5 mm PH000), unscrew one short screw.


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Step 4. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew 11 long screws.


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Step 5. Open the cover

Remove the cover with antennas and an NFC tag. The cover protects the printed circuit board (PCB). Try to lift the cover by the edges and not push anything between them to not accidentally touch or short-circuit anything on the circuit board.


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Step 6. Disconnect the battery connector

Disconnect the battery connector as soon as possible. It is better to use a non-metal or plastic tool to avoid any damage.

ℹ️️ The Xiaomi Mi 9T model has a battery BP41 with 4000 mAh capacity (aka rechargeable battery).

⚠️️ It is highly recommended to disconnect the connector to avoid possible short circuits during disassembly.


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Step 7. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew 8 long screws.


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Step 8. Remove the loudspeaker

Pry over the edge and remove the loudspeaker assembly with antennas.


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Step 9. Remove the inter-board cable

Carefully, preferably from the edge, disconnect the connectors 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.


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Step 10. Disconnect the connectors

Disconnect the coaxial cable connector, cable to the mainboard, and fingerprint sensor cable on the daughterboard.

⚠️️ Do not pull on the cable or pry it with a sharp tool, the connectors are pretty weak and break easily, or the cable falls out of the end (lug).


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Step 11. Remove the daughterboard

Remove the sub-board. It may be glued to the frame with metalized tape, so to facilitate the process, the sub-board can be heated a bit.

The sub-board, also, may be attached with attachments like latches or hooks, be careful.

ℹ️️ The sub-board contains a charging port (Micro-USB), microphone, spring contacts for the speaker, vibration motor, and an antenna unit.

⚠️️ It is not necessary to insert the tool underneath when removing the sub-board. Internal components could be damaged.


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Step 12. Remove the cameras

Pry up the connector and remove the two rear cameras assembly.


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Step 13. Remove the rear camera

Pry up the connector and remove the third rear camera.


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Step 14. Unscrew one screw

Using a screwdriver (Flat-head Screwdriver), unscrew one screw .


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Step 15. Disconnect the connectors

Pry up the connectors of the display module cable, sensor cable, pop-up front camera cable, and coaxial cable.

⚠️️ 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.


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Step 16. Remove the motherboard

Carefully remove the printed circuit board. 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.


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Step 17. In the display frame remained

ℹ️️ In the display frame remained: the earpiece speaker, battery, fingerprint sensor, pop-up front camera, coaxial cable, and vibration motor.

Detailed disassembly instructions of Xiaomi Mi 9T in the video, made by our mobile repair & service center:

If you have a question, ask us, and we will try to answer in as much detail as possible. If this article was helpful for you, please rate it.


Disassembling\Repair has medium complexity and takes about 14 minutes in time. Our manual is suitable for all models Xiaomi Mi 9T — Xiaomi Mi 9T M1903F10G released for markets in different countries.



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