I forgot my password avg anti theft is closed and I can not run my phone so when I change sim card a

AVG Protection
3

Meema, Don't know if this will help?.. Have a look @ this article (https://support.avg.com/SupportArticleView?urlname=Unlock-a-device-locked-by-AVG-AntiVirus-for-Android).
AVG Guru

1 
The problem of the phone lock and loss Basord theft
2

Meema, Don't know if this will help?.. Have a look @ this article (https://support.avg.com/SupportArticleView?urlname=Unlock-a-device-locked-by-AVG-AntiVirus-for-Android).
AVG Guru