I tried to root my mobile phone HTC desire 820 Dual sim.
I unlocked boot loader, flashed TWRP2.8 but none of Super SU could root my phone (Android version 6.0.1).
Recently been to HTC service center to replace battery. They mentioned that if we change battery for unlocked phone, phone may not work.
How to remove TWRP and get my phone back to early setting and lock it?