Disassembly/Repair of the mobile device ZTE Nubia Z11 (ZTE Nubia Z11 NX531J) with each step description and the required set of tools.

Using a screwdriver (Hex T2), unscrew the two screws at the end of the phone.

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.

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

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the three screws and remove the bracket holding the connectors.

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 ZTE Nubia Z11 NX531J model has a battery Li3829T44P6h806435 with 3000 mAh capacity (aka rechargeable battery).

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

Pry up the fingerprint sensor connector and remove the cover.

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the six screws.

Pry over the edge and remove the loudspeaker assembly with antennas.

Using a screwdriver (Phillips 1.5 mm PH000), unscrew one screw securing the sub-board .

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 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.

Pry up the connector of the side buttons cable, display module cable, coaxial 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.

Pry up the connector on the motherboard, and remove the front (selfie) camera.

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the seven screws secuting the motherboard.

Turn the motherboard over. 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.

ℹ️️ In the display frame remained: the battery, coaxial cable, charging port.