I change my sim card then my device locked and I forgot my anti - theft password .so I search to how

Jester, Don't know if this will help?.. Have a look @ this article (http://avgclick.me/LockedPhone) . Otherwise, Please click on the following link (http://avgclick.me/AVGtechnical) and fill out your details, select as Android then the name of AVG Program that you installed in your mobile and in description please completely explain about your issue and finally click on Email option. The AVG mobile team will reply back to you via email with a resolution.
AVG Guru

I change my sim card then my device locked and I forgot my anti - theft password .so I search to how to my password then I already changed it successfully but when im tryng to unlock my device my new password didn't work .what do I have to do with it .I really need my phone.

Jester, Don't know if this will help?.. Have a look @ this article (http://avgclick.me/LockedPhone) . Otherwise, Please click on the following link (http://avgclick.me/AVGtechnical) and fill out your details, select as Android then the name of AVG Program that you installed in your mobile and in description please completely explain about your issue and finally click on Email option. The AVG mobile team will reply back to you via email with a resolution.
AVG Guru