How to Uninstall Avast Anti Theft for Android?
If you have installed Avast and the Avast anti theft application on your Android and decide you no longer need it, you may find it difficult to remove. It is protected so you first need to remove it’s protection. Here’s how to do it.
Goto Settings >> Security >> Select Device Administrators – you can then remove the tick mark alongside the app.
Now again Got To Apps-> Uninstall Avast and the Anti-theft.