Only the following Countries are supported: 

Austria, Germany, Switzerland, Slovenia, Bosnia and Herzegovina, Bulgaria, Romania, Kosovo, Poland, Czech, Hungary, Slovakia, Macedonia, Serbia.

To check Country You can use this service:  "SAMSUNG IMEI INFO"

If code is NOT FOUND in this database, use SAMSUNG EUROPE - ALL MODELS & CARRIER (NCK/MCK)!

All codes are from Samsung Database, Verification/Refund not accepted!

If Phone will ask for Regional Lock - RGCK - No Refund Provided!

The service only provides NCK & MCK codes.

NOTE: If you get something like "Network lock unsuccessful" it means that the phone has the unlock counter locked.

SOLUTION:

Enter the MCK code to unfreeze your phone first (this will also state it was unsuccessful) followed by entering your unlock code NCK and it will unlock your phone or enter MCK code power on/off the phone and try again NCK code. UNLOCK DONE.

Codes are coming from a database, strictly NO REFUND at any reason.

Reason for code not to work is either carrier has changed unlock code or Simlock data is corrupted.

There is No Verify option for codes obtained by this tool. Strictly No Refunds even with videos.