Update guide for Oxygen OS1.02 (new version)In both cases, the downloaded zip file should be in the internal memory or you can also put it on a USB OTG stick and choose location in TWRP.Case 1- (If you are on oxygen rom 1.01)Go to recoveryWipe cache and dalvik (optional)Flash ROMFlash SuperSU (click here to download latest stable)Wipe cache and davik and reboot.Case 2- (from another ROM)Factory reset>Advanced wipe and wipe system/data/cache/dalvikFlash ROMFlash SuperSU (click here to download latest stable)Wipe cache and davik and reboot.Flashing SuperUser can be done after you boot into OS also... some users have issue with SuperSU gone after flash... just flash SuperSU..