Disassembly/Repair of the mobile device ZTE Blade A520 with each step description and the required set of tools.

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.

There is an indentation at the end of the battery on the middle cover. Hook the battery at this point, lift it up and remove the battery.

ℹ️ The ZTE Blade A520 model has a battery Li3824T44P4h716043 with 2400 mAh capacity (aka rechargeable battery).

Using a screwdriver (Phillips 1.5 mm PH #000), unscrew 15 screws.

Pry over the edges. Move an opening tool along the edge detach the clips and remove the middle cover with a loudspeaker 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.

Disconnect the coaxial cable connector, inter-board cable connector.

Pry at the bottom and unstick the vibration motor.

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

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, vibration motor, 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 and remove the coaxial cable.

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

Disconnect the connectors for display module cable, side buttons cable, inter-board cable.

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.

ℹ️ In the display frame remained: the earpiece speaker.