@spencer10
That reminds me that I could not activate my premium license on an old phone of mine with Android 2.2.1. In fact, the error message complained about “no Google Play Services”.
According to this Google page, devices older than Android 2.3 do not get Play Services.
https://developer.android.com/google/play-services/index.html
The weird thing, though, is that AAT does install and actually sort of works on Android 2.2.1 with no Play Services, even receives web commands. Avast apps checked for Google Play Services only when I tried to activate my premium license.