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

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.

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.

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

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

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

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

Disconnect the battery connector as soon as possible. It is better to use a non-metal or plastic tool to avoid any damage.

ℹ️ The Xiaomi RedMi 4A model has a battery BN30 with 3030 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.

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

Pry up the connectors and remove the coaxial cable.

Disconnect the coaxial cable connector, inter-board cable.

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

ℹ️ 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.

Disconnect the connector on the motherboard. Pry at the end of the body and remove the rear camera with its frame.

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

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

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 and remove the vibration motor.

⚠️ Be careful! The vibration motor is glued a bit with adhesive.

Unstick the side buttons cable and remove it.

ℹ️ In the display frame remained: