If you have already installed Team Win Recovery Project (TWRP) on your J710F, backing up EFS is straightforward. Turn off your device.
Boot your J710F into TWRP Recovery (Hold Volume Up + Home + Power). Tap on the menu. Deselect all partitions except for EFS . Swipe to back up. j710f efs file
Installing a custom firmware or custom ROM meant for a different variant (e.g., J710M or J710G) onto a J710F. If you have already installed Team Win Recovery
The phone is stuck in Airplane mode or cannot turn on cellular data. Firmware Downgrade Errors: j710f efs file
For repair professionals, tools like the or Octoplus Box are the standard.