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Disassembly/Repair of the mobile device Xiaomi Redmi Note 8 (Xiaomi Redmi Note 8 Dual M1908C3JG) with each step description and the required set of tools.


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How to disassemble Xiaomi Redmi Note 8, Step 1/1 How to disassemble Xiaomi Redmi Note 8, 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.


How to disassemble Xiaomi Redmi Note 8, Step 2/1 How to disassemble Xiaomi Redmi Note 8, Step 2/2

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 the 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.

⚠️️ Pay attention to the fingerprint sensor cable! The cable connects the fingerprint sensor on the back cover to the motherboard.


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Step 3. Disconnect the connector

Pry up the fingerprint sensor connector and remove the back cover.


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Step 4. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH #000), unscrew 11 screws.


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Step 5. Open the cover

Pry over the edges. Move an opening tool along the edge detach the clips and remove the middle cover. The middle cover protects the printed circuit board (PCB).


How to disassemble Xiaomi Redmi Note 8, Step 6/1 How to disassemble Xiaomi Redmi Note 8, Step 6/2

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 Redmi Note 8 model has a battery BN46 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 PH #000), unscrew the seven screws.


How to disassemble Xiaomi Redmi Note 8, Step 8/1 How to disassemble Xiaomi Redmi Note 8, Step 8/2

Step 8. Remove the loudspeaker

Pry over the edge and remove the loudspeaker assembly.


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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 connector

Disconnect the coaxial cable connector.


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Step 11. Remove the daughterboard

Remove the sub-board. It may be glued to the frame or attached with attachments like latches or hooks, so be careful.

ℹ️️ The sub-board contains a charging port (Micro-USB), microphone, spring contacts for the speaker, 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 front camera

Disconnect the connector on the motherboard, and remove the front (selfie) camera.


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Step 13. Remove the cameras

Disconnect connectors on the motherboard, and remove the assembly of the four rear cameras.

Also, we disconnect the coaxial cable connector and connector to the display module.


How to disassemble Xiaomi Redmi Note 8, Step 14/1 How to disassemble Xiaomi Redmi Note 8, Step 14/2

Step 14. Unscrew one screw

Using a screwdriver (Phillips 1.5 mm PH #000), unscrew one screw securing the motherboard.


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Step 15. 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.

Detailed disassembly instructions of Xiaomi Redmi Note 8 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 9 minutes in time. Our manual is suitable for all models Xiaomi Redmi Note 8 — Xiaomi Redmi Note 8 Dual M1908C3JG released for markets in different countries.



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