Clean Flash Guide:-
Kindly Read it Carefully before Proceeding
Make sure your bootloader is unlocked.
Backup your entire internal storage as it will be wiped in the final step before rebooting to the system.
Flash recommended recovery.Type #twrp14 in group to get recovery.
fastboot flash recovery_ab recovery.img
After finishing with that, get into recovery by pressing the power button and volume up button. Or you can run
fastboot reboot recovery
Download latest Evolution x file here or type "/evo marble" in group.
Download the recommended firmware. Choose firmware file according to your device region.
Now Install the ROM either by doing the normal flashing step or use adb sideload.
Flashing steps :-
•Copy firmware & rom zip to internal storage or you can use USB OTG.
Make sure you Enable checkbox ☑️"Automatically reflash Twrp after flashing a Rom"
•Flash recommended Firmware (you can skip if already on the latest firmware)
•Flash Rom
•Format data
•Reboot to system