I have weekly 6.9.29 (Android 5.1)
How to upgrade to the latest version 7.1.19/20 (Android 7.0).
Why a guide if there is no firmware to version Mi4c with (Android 6.0):
How to update to Android 7.0 from Android 6.0:
- Install LATEST Android 6.0 release for MI5 6.11.10
- Install TWRP 3.0.2.3 or...