I have 3 lines all with Advanced Calling enabled. Integrated calling was able to be set up on 2 lines, but fails to activate on my main line. I always get "Unable to setup integrated calling on your account at this time. Please try again later."
I have tried to turn off and on Advanced Calling on my phone, and also removed and readded Advanced Calling via Manage Products and Apps on My Verizon.
I have seen several errors when I start the app on the tablet at different times: "SPG Internal Processing error", "IMS sign in failed", and "HTTP SOCKET ERROR"
All 3 phones are the same and 3 tablets are the same, so I have concluded there is something wrong with my main line via Verizon's servers.