Acer Iconia Talk S (acer-a1-724)

This tablet is similar to C Spire FT7 (HFS-FT7), and it could be possible to add supports for it.

Audio
Microphones are broken.

GPS
No idea how to test yet.

Magnetometer
No idea how to test yet.

Ambient Light/Proximity Sensor
The driver for  ambient light/proximity sensor is not available.