Verify the exact REVVL V 5G model and region
Back up all data
Charge the phone to at least 70%
Install Android Platform Tools on your computer
Install the correct USB drivers for the phone
Download the custom ROM made specifically for your exact device
Download the required firmware, vendor files, and recovery if the ROM developer specifies them
Check whether the bootloader can be unlocked on your carrier variant
Enable Developer Options on the phone
Enable OEM unlocking
Enable USB debugging
Connect the phone to the computer
Open a command window in the Platform Tools folder
Verify ADB connection with `adb devices`
Reboot to bootloader with `adb reboot bootloader`
Verify fastboot connection with `fastboot devices`
Unlock the bootloader with the correct fastboot unlock command for the device
Confirm the unlock on the phone if prompted
Reboot back to bootloader if needed
Flash the custom recovery if the ROM requires one
Boot into recovery
Wipe data, cache, and system partitions as required by the ROM instructions
Format data if the ROM instructions require it
Transfer the ROM ZIP to the phone or sideload it
Flash the ROM ZIP from recovery
Flash any required GApps package if needed
Flash any required Magisk or add-on packages if needed
Wipe cache and dalvik/art cache after flashing
Reboot the system
Wait for the first boot to complete
Set up the phone
Reflash or restore only files and apps compatible with the new ROM
Keep the stock firmware package available for recovery
Use only ROMs and instructions confirmed for the REVVL V 5G model
Stop if the bootloader cannot be unlocked or if no device-specific ROM exists