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Xperia Z is not asking for Network Unlock Code

Message 1 of 1
Message 1 of 1

Xperia Z is not asking for Network Unlock Code

My phone is locked to a network provider (three), but recently I switched to another provider (LycaMobile). I have the unlock code from (three), but the phone doesn't ask me to enter it. I have tried (literally) everything from google and youtube, and ended up with nothing. This doesn't seem a new issue, I already found few people here have the same problem as it is shown in the links below


However, in both cases, the problem disappeared randomly without doing any action. I wish if it was the same situation with my case, but unfortunately it is not, and now I am stuck with this issue.


Please, can anyone give me help!!!