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please Z3X box team samsung n910R4 unlocking err

UNLOCK INSTRUCTIONS:
Micro-USB cable:
1. Phone must be powered on.
2. Type *#0808# and select ‘DM+MODEM+ADB’.
3. Type *#9090# and choose ‘DM/DUN over HSIC’.
4. Reboot phone.
Or use ‘Activate Diag’ function from ‘Repair’ tab.
5. Connect USB cable, install drivers if needed.
6. Select Samsung diagnostic port in port settings.
7. Press ‘Unlock’ button for direct unlock.

Operation: Unlock
Selected model: SM-N910R4
Selected port: COM3 H5321 gw Mobile Broadband Device Management
Software version: 26.5

Reading phone info…
Reading IMEI… OK
IMEI: 0
Unlocking… error (1)

Done with Samsung Tool PRO v.26.5