Teardown difficulty:
Moderate
Duration:
10 min

Recommended tools

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


Specialist in content creation, distribution and content management.


How to disassemble Xiaomi RedMi 3S, Step 1/1

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 3S, Step 2/1 How to disassemble Xiaomi RedMi 3S, Step 2/2

Step 2. Open the back cover

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

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.

⚠️️ Pay attention to the fingerprint sensor cable located on the inside.


How to disassemble Xiaomi RedMi 3S, Step 3/1 How to disassemble Xiaomi RedMi 3S, Step 3/2 How to disassemble Xiaomi RedMi 3S, Step 3/3

Step 3. Disconnect the connector

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


How to disassemble Xiaomi RedMi 3S, Step 4/1

Step 4. In the housing remained

The back cover.


How to disassemble Xiaomi RedMi 3S, Step 5/1 How to disassemble Xiaomi RedMi 3S, Step 5/2

Step 5. Unscrew the screws

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


How to disassemble Xiaomi RedMi 3S, Step 6/1 How to disassemble Xiaomi RedMi 3S, Step 6/2

Step 6. 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.


How to disassemble Xiaomi RedMi 3S, Step 7/1 How to disassemble Xiaomi RedMi 3S, Step 7/2 How to disassemble Xiaomi RedMi 3S, Step 7/3

Step 7. 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 3S model has a battery BM47 with 4000 mAh capacity (aka rechargeable battery).

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


How to disassemble Xiaomi RedMi 3S, Step 8/1 How to disassemble Xiaomi RedMi 3S, Step 8/2

Step 8. Unscrew the screws

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


How to disassemble Xiaomi RedMi 3S, Step 9/1 How to disassemble Xiaomi RedMi 3S, Step 9/2

Step 9. Remove the loudspeaker

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


How to disassemble Xiaomi RedMi 3S, Step 10/1 How to disassemble Xiaomi RedMi 3S, Step 10/2

Step 10. Unscrew one screw

Using a screwdriver (Philips 1.5 mm PH #000), unscrew one screw securing the sub-board.


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

Step 11. Disconnect the connectors

Disconnect the coaxial 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).


How to disassemble Xiaomi RedMi 3S, Step 12/1 How to disassemble Xiaomi RedMi 3S, Step 12/2

Step 12. Remove the 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 RedMi 3S, Step 13/1 How to disassemble Xiaomi RedMi 3S, Step 13/2

Step 13. Unscrew one screw

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


How to disassemble Xiaomi RedMi 3S, Step 14/1 How to disassemble Xiaomi RedMi 3S, Step 14/2

Step 14. Remove the rear camera

Disconnect the connector on the motherboard, and remove the main camera.


How to disassemble Xiaomi RedMi 3S, Step 15/1 How to disassemble Xiaomi RedMi 3S, Step 15/2 How to disassemble Xiaomi RedMi 3S, Step 15/3

Step 15. Disconnect the connectors

Pry up the connectors of the side buttons cable, display cable, touchscreen cable, and front camera 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.


How to disassemble Xiaomi RedMi 3S, Step 16/1 How to disassemble Xiaomi RedMi 3S, Step 16/2 How to disassemble Xiaomi RedMi 3S, Step 16/3

Step 16. Turn over the PCB

Turn over the motherboard, disconnect the connectors of the inter-board cable and coaxial cable from the inside and remove the motherboard.


How to disassemble Xiaomi RedMi 3S, Step 17/1 How to disassemble Xiaomi RedMi 3S, Step 17/2

Step 17. Remove the front camera

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


How to disassemble Xiaomi RedMi 3S, Step 18/1 How to disassemble Xiaomi RedMi 3S, Step 18/2

Step 18. 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.


How to disassemble Xiaomi RedMi 3S, Step 19/1 How to disassemble Xiaomi RedMi 3S, Step 19/2 How to disassemble Xiaomi RedMi 3S, Step 19/3

Step 19. In the display frame remained

ℹ️️ In the display frame remained: the coaxial cable, inter-board cable, vibration motor.

Detailed disassembly instructions of Xiaomi RedMi 3S 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 10 minutes in time. Our manual is suitable for all models Xiaomi RedMi 3S released for markets in different countries.



Back to the list
˄˅

Advertisement

˃˂

Advertisement