Teardown difficulty:
Hard
Duration:
8 min

Recommended tools

Disassembly/Repair of the mobile device Xiaomi Mi 4 (Xiaomi Mi 4 2014216) with each step description and the required set of tools.


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How to disassemble Xiaomi Mi 4, Step 1/1 How to disassemble Xiaomi Mi 4, Step 1/2

Step 1. 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.


How to disassemble Xiaomi Mi 4, Step 2/1 How to disassemble Xiaomi Mi 4, Step 2/2

Step 2. Unscrew the screws

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


How to disassemble Xiaomi Mi 4, Step 3/1 How to disassemble Xiaomi Mi 4, Step 3/2

Step 3. Open the middle cover

Pry over the edges. Move an opening tool along the edge detach the clips and remove the middle cover with a loudspeaker, flashlight and antenna pads and tracks. The middle cover protects the printed circuit board (PCB).

Try to lift the cover by the edges and don't push anything too far inside, so as not to accidentally break or short-circuit anything on the circuit board.


How to disassemble Xiaomi Mi 4, Step 4/1

Step 4. In the middle cover

In the middle cover remains:


How to disassemble Xiaomi Mi 4, Step 5/1 How to disassemble Xiaomi Mi 4, Step 5/2

Step 5. Unscrew the screws

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

Also we remove the small antenna.


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Step 6. Disconnect the connectors

Disconnect the coaxial cable connector on the sub-board. Disconnect the inter-board cable connector on the motherboard.

⚠️️ 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).


How to disassemble Xiaomi Mi 4, Step 7/1 How to disassemble Xiaomi Mi 4, Step 7/2

Step 7. Remove the daughterboard

Peel back the inter-board cable and 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.


How to disassemble Xiaomi Mi 4, Step 8/1 How to disassemble Xiaomi Mi 4, Step 8/2 How to disassemble Xiaomi Mi 4, Step 8/3

Step 8. Disconnect the connector

Pry up the display connector and bend the flat cable away.


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Step 9. 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 Xiaomi Mi 4 model has a battery BM32 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.


How to disassemble Xiaomi Mi 4, Step 10/1 How to disassemble Xiaomi Mi 4, Step 10/2

Step 10. Remove the front camera

Disconnect the connector on the motherboard, and remove the front (selfie) camera. Also, remove the cover for headphone jack socket.


How to disassemble Xiaomi Mi 4, Step 11/1 How to disassemble Xiaomi Mi 4, Step 11/2 How to disassemble Xiaomi Mi 4, Step 11/3

Step 11. Disconnect the connectors

Pry up the connectors of the side buttons cable, touchscreen cable, proximity sensor 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 12. 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.


How to disassemble Xiaomi Mi 4, Step 13/1 How to disassemble Xiaomi Mi 4, Step 13/2

Step 13. Remove the proximity sensor

Carefully remove the proximity sensor. Also, we detach a cover for headphone jack socket cover.


How to disassemble Xiaomi Mi 4, Step 14/1 How to disassemble Xiaomi Mi 4, Step 14/2

Step 14. Remove the earpiece speaker

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.


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Step 15. In the display frame remained

ℹ️️ In the display frame remained:

Detailed disassembly instructions of Xiaomi Mi 4 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 hard complexity and takes about 8 minutes in time. Our manual is suitable for all models Xiaomi Mi 4 — Xiaomi Mi 4 2014216 released for markets in different countries.



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