I have a Pixel phone, and am using a prepaid plan (Simply Prepaid). Am having several problems with wifi calling on the Pixel, and am looking for comments. Like if I upgraded to a T-Mobile One plan instead of using a prepaid plan, would wifi calling work any differently? I've tried my iPhone 6S on the prepaid plan with the same SIM, and wifi calling on that works perfectly, no problems...so I just don't know if upgrading my plan will affect any of this:
1. If I don't answer an incoming call, it never goes to voicemail. The call will repeat several times (???), then just end without ever going to voicemail. I can make an incoming call go to voicemail by rejecting it several times, but otherwise unanswered incoming calls don't go to voicemail. I'm thinking it kind of looks like its trying to forward to voicemail but failing several times.
2. Callers to my Pixel phone do not hear the usual ring indication while they're waiting for me to answer...they just hear silence, so it sounds broken. And, at the very end, if I don't answer, they hear only a busy signal and a "call failed" indication. So calling my Pixel seems really broken to callers.
Like I said, if I put the SIM in my iPhone and use wifi calling (which is used automatically in my low-coverage house :-), it works fine. Callers hear the ring indication while they're waiting for me to answer, and unanswered calls go to voicemail as they should.
Any comments on this? Given that the iPhone works well, I feel that the Pixel should, too. By the way, I first tried a "reset network settings", and that didn't change anything. Then I tried a full factory reset and reconfigured the phone and settings manually...that took a while :-), but no change, still the same problems.