Hello Apek
We regret for the inconvenience you are facing with the Antitheft feature. If you have installed AVG AntiVirus on your phone you might have enabled Anti-Theft service. If you change the SIM card the device will be locked automatically. To unlock the device, you need to use your Anti-Theft password.
If you have forgotten Anti-Theft password or when it doesn't accept the password please follow these steps on the article http://avgread.me/1WvQqze . Do not remove your device from the Remote Management at avgmobilation, Removing the device will keep it locked. Also device must be connected to a known network Use your AVG MyAccount or Google Account.
Hello Apek
We regret for the inconvenience you are facing with the Antitheft feature. If you have installed AVG AntiVirus on your phone you might have enabled Anti-Theft service. If you change the SIM card the device will be locked automatically. To unlock the device, you need to use your Anti-Theft password.
If you have forgotten Anti-Theft password or when it doesn't accept the password please follow these steps on the article http://avgread.me/1WvQqze . Do not remove your device from the Remote Management at avgmobilation, Removing the device will keep it locked. Also device must be connected to a known network Use your AVG MyAccount or Google Account.
Apek, Please note that this Community deals mainly with the technical queries regarding AVG Windows products. AVG Android support is provided through email only. Also in future please refrain from carrying out multiple topic postings on the same subject! You won't obtain an answer to your query any faster!. Other posting (https://support.avg.com/answers?id=906b0000000DWe9AAG).
AVG Guru
Thank you.