N971n: U2 Imei Repair Z3x !new!
Once the repair is complete, the IMEI will show, but you will likely have "No Service." Go to the or Backup tab in Z3X. Click Patch Certificate . The phone will reboot. Wait for the signal bars to appear. ⚠️ Critical Notes
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When an SM-N971N loses its IMEI (usually due to a failed firmware update, corrupted EFS, or incorrect root attempt), the device shows: Once the repair is complete, the IMEI will
| Cause | Description | |-------|-------------| | Flashing Incompatible Firmware | Using Odin to flash the wrong stock ROM or a firmware that is not signed for the specific device can corrupt the NVRAM partition where the IMEI is stored. | | Rooting Attempts | Improper rooting, especially with Magisk, can inadvertently damage the EFS (Encrypted File System) partition. | | Hardware Flashing Errors | Interruptions during the write process (e.g., a disconnected USB cable) can leave the modem partition incomplete. | | File System Corruption | General file system errors after a crash or failed OTA update can also lead to a lost IMEI. | Wait for the signal bars to appear
button. The software will communicate with the device, and Magisk may prompt you to "Grant" superuser permissions on the phone screen— accept this immediately