Disclaimer: This process wipes your data. It will void your warranty (which is expired anyway). I am not responsible for bricked devices.
For daily use, the M8 struggles with modern, resource-heavy apps. However, as a secondary media player or a dedicated project phone, Android 12 makes it feel years younger. Surprisingly, some developers have even pushed the M8 as far as Android 14 (LineageOS 21.0) , proving this hardware simply refuses to die. Ready to start? Head over to the HTC One M8 XDA Forum htc one m8 android 12
: Boot into fastboot mode (Volume Down + Power) and flash TWRP using a computer. Disclaimer: This process wipes your data
The Snapdragon 801 is a 28nm chip. It is inefficient by modern standards. Running Android 12 pushes the CPU to 100% more often. Expect – down from 4.5 hours on KitKat. For daily use, the M8 struggles with modern,