Fairphone Loudspeaker Audio Issues Due to Physical Microphone Obstruction

The most likely cause for loudspeaker microphone issues is the physical obstruction of the secondary noise-canceling or loudspeaker-dedicated microphones by cases, screen protectors, or debris. To confirm this, perform the built-in hardware diagnostic test by entering *#*#2886#*#* in the dialer. Follow the prompts to test each microphone individually. If the test fails to register audio input when scratching near specific ports, inspect those ports for lint, dust, or case blockage. If the test fails despite a clear port, the hardware sensor itself is obstructed or malfunctioning.