Teardown difficulty:
Moderate
Duration:
9 min

Recommended tools

Disassembly/Repair of the mobile device Xiaomi Mi 4C with each step description and the required set of tools.


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How to disassemble Xiaomi Mi 4C, Step 1/1 How to disassemble Xiaomi Mi 4C, 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 cards 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

Using a spudger or a plastic pick, carefully, around the edge, detach the back cover clips, and remove it.

Do not insert the tool deeply or bend it. Otherwise, the housing may be tampered with or damaged.


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Step 3. Unscrew the screws

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


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Step 4. Open the cover

Pry over the edges. Move an opening tool along the edge detach the clips and remove the cover with antenna pads and tracks.


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Step 5. Remove the battery

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 4C model has a battery BM35 with 3000 mAh capacity (aka rechargeable battery).

With extreme care, remove the battery because it is glued from the inside by the manufacturer.

Also, we need to remember or look in advance at the location of the flat cables under the battery, so as not to damage them.


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Step 6. Unscrew the screws

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


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Step 7. Remove the loudspeaker

Pry over the edge and remove the loudspeaker assembly.


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Step 8. Remove the coaxial cable

Disconnect connectors and detach the coaxial cable.


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Step 9. Disconnect the connectors

Disconnect the cable connector, inter-board cable connector.

⚠️️ 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 10. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH #000), unscrew the two screws securing the sub-board.


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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

Pry at the bottom and remove the earpiece speaker.

⚠️️ Be careful! The earpiece speaker is glued a bit with adhesive.

⚠️️ If we pry the speaker in the middle we may break the earpiece speaker in half.

Pry at the bottom of the body and remove the front (selfie) camera.

⚠️️ Be careful! The camera is glued a bit with adhesive too.


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Step 13. Disconnect the connectors

Pry up the connectors of the side buttons cable, proximity sensor cable, display module cable, inter-board 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 14. Unscrew the screws

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


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Step 16. In the display frame remained

ℹ️️ In the display frame remained:

Detailed disassembly instructions of Xiaomi Mi 4C 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 Mi 4C released for markets in different countries.



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