BACKUP INSTRUCTIONS:
Phone must be rooted!
If the software can't root the phone automatically,
then you must root your device manually.
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Read EFS' button to read backup or 'Write EFS' to restore.
6. Press 'Read CERT' button to read certificates or 'Write CERT' to restore.
7. Press 'Write NV DATA' if you need to restore NV backup.
Operation: Write CERT
Selected model: SM-N920C
Software version: 25.5
Waiting ADB device... OK
Reading phone info...
Model: SM-N920C
Android version: 6.0.1
Product code: SM-N920CZDUMTZ
Phone version: N920CXXU2IPD5
PDA version: N920CXXU2BPD6
CSC version: N920COJV2BPD6
CSC country code: Zambia
CSC sales code: MTZ
HW version: MP 0.700
Phone S/N: RF8GC01K2MX
Modem board: SHANNON333
RF cal date: 20151202
IMEI:
Checking Super user right... true
Initializating zTool... OK
Running zTool, please wait...
Start... OK
Init... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data... error (8)
Done with Samsung Tool PRO v.25.5
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