Ashma, 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
I installed the avg antivirus in my mobile galaxy note 2 android version when i tried to change my sim card it was locked and i tried to open the lock it won't work. it's been 2 days and i won't able to receveive and call my phone calls… it's suck just help me asap.
thanking you
Ashma, 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