Sim card change, phone locked

Willem, Don't know if this will help?.. Have a look @ this article (http://avgclick.me/LockedPhone).
AVG Guru

no device registered, please advise

i changed my sim to a LTA sim, and my phone need a password , witch i cant remember

no device registered, please advise

Hi Willem,
Please make sure you are login using AVG Account.
If it doesn't help than reseting phone to default factory settings might be only option.
Thanks

Willem, Don't know if this will help?.. Have a look @ this article (http://avgclick.me/LockedPhone).
AVG Guru