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root first manually then unlock with z3x box.

Selected model: N7100
Selected port: COM4 Z3X BOX Serial Port
Selected port speed: 115200
Searching Samsung modem... detected COM129
Reading phone info...
Software version: =1,1
IMEI: 355056050596678
Done with Samsung Tool v.16.8

Selected model: N7100
Selected port: COM4 Z3X BOX Serial Port
Selected port speed: 115200
Please, allow USB debugging on phone...
Reading phone info...
Model: GT-N7100
Android version: 4.3
Product code: GT-N7100TADFTM
Phone version: N7100BVUEMK1
PDA version: N7100XXUEMK9
CSC version: N7100FTMEML1
IMEI: 355056050596678
Phone S/N: R31CA1KWGEA
Checking Super user right... true
Reading nv data... OK
Checking magic... OK
Detected new type of security
Running zTool, please wait... OK
Calculating... OK
Unlocking... OK
Rebooting phone... OK
Unlock done