OnePlus 3 Daughterboard Replacement

Insert a SIM eject tool, bít, or straightened papérclip into the hole between the SIM card slot and power button.

• Press firmly to eject the SIM card tray.

• Ensure proper orientation during reinstallation, as it fits only in one direction.

Remove the 2.6mm T2 screws located at the bottom edge of the phone.

Improperly opening the phone can damage the display panel.

• Read through these steps before proceeding to avoid damaging the display panel.

Two seams exist between screen and body:

• Display panel seam: Avoid prying here; doing so will damage the display panel.
• Frame seam: Located in a recessed area of the back cover, pry only at this point.

Be aware of fourteen clips holding the frame against the rear case as you remove the back cover.

• Pry along the recessed Frame seam.

Accidental power-on can damage phone components.

• Prevent accidental power-on by avoiding contact with the power button during disassembly.
• Resume disassembly after powering off the phone if it inadvertently turns on.

Do not use metal tools to avoid cracking the screen.

• Place a suction cup near the bottom edge of the display for access.
• Pull on the suction cup with strong, steady force.
• Press an opening tool's edge into the frame seam near the suction cup until it wedges between the frame and back cover's lip.

Using a new opening tool will help due to tight tolerances; significant force may be required.

Slide the opening tool along the bottom edge of the phone.

• Keep the tool's edge within the seam.
• Guide the tool around the left corner of the phone.

Slide the opening tool along the long edge, releasing clips as you go.

• The last clip near the alert switch may be recessed; use the flat end of a spudger or an opening pick to help release it.

Wiggle the frame gently to release the top and right edge clips.

• Lift up and remove the screen.

Pause here and test your phone's functionality before proceeding with reassembly.

• To reinstall the back cover, align the top edge of the frame to the back cover.
• Ensure that the top clips slip into place.

Press along the long edges of the phone to snap the remaining clips into place.

Use a spudger to pry up and disconnect the battery connector from its socket above the top right corner of the battery pack.

Bend the connector away from the socket to prevent accidental contact with other components, which can cause damage or malfunction.

• To re-attach press connectors, carefully align and press down on one side until it clicks into place.
• Repeat this process for the other side, but do not press in the middle.

Misaligned connections can cause pin bending, resulting in permanent damage to the connector or surrounding components.

• Remove the 3mm Phillips screw securing the cable bracket.
• Remove the cable bracket.

Use the spudger to gently pry up the interconnect flex cable from the motherboard, taking care not to damage any surrounding components.

• The interconnect flex cable is located above the battery.
• Repeat this process for the daughterboard flex cable.

Use the point of a spudger to gently pry up and release the interconnect flex cable from the daughterboard, situated beneath the battery.

Disconnect the interconnect flex cable.

• Use the point of a spudger to pry up and disconnect the capacitative buttons connector.
• Locate the daughterboard below the battery, then repeat the process for the fingerprint scanner connector.

Insert the spudger under the antenna interconnect cable and gently pry to release.

• The cable should now be disconnected from the daughterboard.

• Remove two 3 mm black screws.
• Remove five 2.9 mm silver screws.

Slide a spudger under the loudspeaker vent, twisting gently to release the daughterboard from its plastic clips.

• The clips will release once you feel a slight resistance.

Remove the daughterboard.

• To reinstall:
• Place one side edge of the daughterboard to the phone.
• Press down on the other side until the daughterboard clicks into place.

If it does not click easily, check for trapped flex cables or antenna cables underneath.