Amdocs PSG @ AT&T

Instuctions
1. Download the iPhone version of the app from the Amdocs PSG webpage
2. Tap on Install
3. Go to Settings -> General -> Device Management
4. Tap on “Amdocs, Inc.”
5. Tap on “Trust Amdocs, Inc.”
6. Tap on “Trust”
That's it! You are good to go