Turn on the phone, go to Developer Options, and enable .
Direct connection to the motherboard's USB port (avoid external hubs).
Never skip this safety step. If a writing error occurs, you will need a backup to prevent bricking the baseband. Open on your PC. Select the exact model: . Go to the Backup tab.
Once you finish these steps, type *#06# into the phone's dialer application to confirm your IMEI is fully restored and verified.
Long-press to unlock the bootloader. Note that this step will perform a factory reset. 2. Rooting the Device (Binary 2 Specific) n971n u2 imei repair z3x
This guide is specific to U2 . Do not attempt to downgrade firmware below Binary 2.
Re-enable Debugging; reinstall the Samsung USB Driver package. Magisk did not grant permissions.
Extract the AP file from the firmware package and transfer it to the phone's internal storage.
Ensure you are strictly using baseband binaries before running the patch. Turn on the phone, go to Developer Options, and enable
After the IMEI is written, the phone may still show “No Service” or “Emergency Calls Only” because the network authentication certificate (Certificate) is invalid. To fix this:
Open Magisk app on the phone, keep screen awake, and click "Grant" when the pop-up appears. The certificate signature is broken.
Before attempting any repair, always back up the current EFS and modem partitions. In the Z3X tool, navigate to the tab and perform a full backup. Save the backup files (usually with .bin or .zip extension) in a safe location on your PC.
Repairing the IMEI on the N971N U2 is a complex, multi-stage process involving rooting, Z3X software, and patching. Always ensure you have a backup of your EFS partition before you begin. If you face a total network loss, the use of specialized "NG fix" files is essential. If you'd like, I can: If a writing error occurs, you will need
Rooting and repairing will trip the Knox counter (0x1), permanently disabling Samsung Pay and Secure Folder.
Power on the device and connect it to your PC via a high-quality USB cable. Select the model in the Z3X software. IMEI Repair Navigate to the tab in Z3X.
: Dial *#0011# to access the service mode menu. Scroll down and look for IMEI Status . It must display OK . If it shows NG , the network patch did not execute correctly. Troubleshooting Common Errors Error Description Root Cause Definitive Fix Z3X Error: "Device not rooted" Magisk binary active but communication blocked.