REPAIR 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. Enable 'USB debugging' in 'Settings'-'Developer options' for Android 4.0 - 4.1.2 or
tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options' in Android 4.2+.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Fill values what you need to repair.
6. Press 'Repair' button.
7. Press 'Reset EFS' if you need to reset it.
Be carefully, do not perform this without necessity and make backup before.
8. Press 'Disable Factory Mode' or 'Patch Sertificate' if needed.

Operation: Repair
Selected model: GT-N7100
Software version: 29.5

If you are looking for 'Repair Network' function then you should use 'Patch Certificate'

Waiting ADB device...
Please, allow USB debugging on phone... OK
Reading phone info...
Model: GT-N7100
Android version: 4.3
Product code: Not Active
Phone version: N7100XXUENA3
PDA version: N7100XXUENA1
CSC version: N7100OJVENA1
CSC country code: UAE
CSC sales code: XSG
HW version: Unknown
Phone SN: 00000000000
Modem board: XMM6262
RF cal date: Unknown
IMEI: 004999010640000
Checking Super user right... true
Reading NV data... OK
Checking magic... OK
zTool not found for selected model

Done with Samsung Tool PRO v.29.5