Teardown difficulty:
Moderate
Duration:
8 min

Recommended tools

Disassembly/Repair of the mobile device Xiaomi Mi 3 with each step description and the required set of tools.


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How to disassemble Xiaomi Mi 3, Step 1/1 How to disassemble Xiaomi Mi 3, 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.


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

Step 2. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH #000), unscrew/drive the two screws out at the end of the phone.


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Step 3. 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.

⚠️️ Be careful when opening the cover from the volume and power buttons side. Thin cable and fragile buttons are straightforward to damage.


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Step 4. Unscrew the screws

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


How to disassemble Xiaomi Mi 3, Step 5/1 How to disassemble Xiaomi Mi 3, Step 5/2

Step 5. Open the cover

Pry over the edges. Move an opening tool along the edge detach the clips and remove the cover with an NFC tag, headphone jack port and antenna pads and tracks.

ℹ️️ 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. 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 3 model has a battery BM31 with 3050 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 7. Remove the loudspeaker

Pry over the edge and remove the loudspeaker assembly with antenna tracks.


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Step 8. Unscrew the screws

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


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Step 9. Disconnect the connectors

Pry up the connectors of the display cable, touchscreen cable, cable to the charging port, coaxial cable, headphone jack port cable.

Also, we unstick the side buttons.

⚠️️ 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.


How to disassemble Xiaomi Mi 3, Step 10/1 How to disassemble Xiaomi Mi 3, Step 10/2

Step 10. 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 11. In the display frame remained

ℹ️️ In the display frame remained: the earpiece speaker, battery, charging port, microphone, coaxial cable, and vibration motor.

Detailed disassembly instructions of Xiaomi Mi 3 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 8 minutes in time. Our manual is suitable for all models Xiaomi Mi 3 released for markets in different countries.



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