Hi, I need a master unblock code for my Samsung galaxy S6. Where can I get it?

[wsharma0813]

I accidentally put in wrong network code. I have the correct one. But now it says it needs a master unblock code. I read a thread here that described how to input 8 instead of 7 digits but didn't understand it. Can someone please explain step wise How and where to get master unblock code? Will be much appreciated. Thank you so much.

 

[bignastyid]

Contact your service provider