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Xperia Z is not asking for Network Unlock Code

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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

 

https://talk.sonymobile.com/t5/Xperia-XZ-Premium/XPeria-XZ-Premium-is-not-asking-for-Network-Unlock-...

 

https://talk.sonymobile.com/t5/Xperia-Z5-Z5-Compact-Z5-Premium/Z5-compact-not-asking-for-Network-Unl...

 

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!!!