L720 unlock error


Domestic unlock ok but phone nor unlocked

Normal unlock (error)
phone verion 4.4.2

Quote:

Operation: Unlock
Selected model: SPH-L720
Selected port: COM35 SAMSUNG Mobile USB Serial Port
Software version: 23.9

Reading phone info…
Reading IMEI… OK
IMEI: 357503051******
Unlocking… error

Done with Samsung Tool PRO v.23.9