Samsung Galaxy S2 network sim lock topic

Hey guys. I have looked into almost every topic on this website that I could find about unlocking the phone. Tried most apps. But not successful! Even when I enter

Code:

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*#7465625#

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nothing appears! I strongly believe that the network has been frozen. I could not find somewhere to tell me if I have reached the number of allowed tries nor how to crack a network freeze!
Any help or threads I have no found (been searching for the past 4 hours) will be very much appreciated!