On your Samsung J710F, the isn't a single file you can tap on. It's a hidden partition (like a secret vault on your phone's eMMC chip) containing critical, device-unique files.
You can't simply copy someone else's EFS to your phone; that would mean two phones sharing the same identity, which is often illegal or simply won't work. The story of the J710F EFS file is often a lesson in digital mortality If you have a backup, you are a hero. j710f efs file
: Ensure your device is Rooted and has a custom recovery (like TWRP) if you are not using a hardware service box. On your Samsung J710F, the isn't a single
Rather than replacing the entire EFS partition with a clone, these tools write a new "certificate" to the device. This repairs the corrupted links and rewrites a valid IMEI to the partition. While this often results in a modified IMEI, it is the most reliable way to restore a J710F that has lost its baseband. The story of the J710F EFS file is