OnePlus charging port boards and connectors.
OnePlus phones use Warp Charge and SUPERVOOC fast charging, which depends on a good charging port. A worn port causes slow charging or loose cables. The charging board also holds the main microphone on many models. Clean the port first to rule out lint.
Related: flex cables.
On most OnePlus models the USB port and the main microphone sit on the same charging board, so replacing it fixes both charging and call audio issues. Disconnect the battery first and route the main flex exactly as before.
Related categories: OnePlus Spare Parts, LCD Screen (OnePlus Spare Parts), LCD Related Parts (OnePlus Spare Parts)