Installed AVG security to my phone and now my phone is locked and can't be opened.
Hello Val.
We are sorry to hear that.
After installing AVG AntiVirus, did you enable the Anti-Theft feature on your device? If you did, please enter the correct PIN to unlock the device.
If you need help to reset the pin, refer to instructions in this article (https://bit.ly/3Cqe90P).