The final official software update for the HTC One M8 varied by region and carrier, but generally settled on Android 6.0 Marshmallow
This is the simplest method and is recommended if your phone is currently unrooted and running an official HTC ROM. htc one m8 stock rom updated
The interface is clean, professional, and avoids the "cartoonish" bloat found in contemporary competitors. The final official software update for the HTC
Reliable repositories like AndroidRUU or HardReset.info host various versions for different regions. htc one m8 stock rom updated