Question: twrp how to flash rom?
Answer: Download and transfer the custom ROM you wish to flash to your device's storage.
Boot your device into TWRP recovery.
Select “Wipe” from TWRP main menu and do a “Swipe to Factory Reset” on the bottom of screen. ... 
Go back to TWRP main menu, tap on “Install” and select the custom ROMs . ... 
After selecting the .