Firmware Update v6.6 - Release Notes:

1. Volume increase by 3db
2. Fixed Xiaomi Redmi phone noise
3. Add "Battery very low" voice prompt

Includes handset compatibility from v6.4: Nokia: 6, 7 Plus, 7.1 & 8.1, Motorola handsets, OnePlus 6 T

NOTE: The upgrade procedure can only be completed using an Android based phone/tablet.