Agreed on all points. Initially I thought it was my phone & very surprised others were having troubles, even iPhones. Thinking it is more of a network congestion issue since it can even happen with a strong LTE signal only hundreds of feet away.
I think all the carriers did a decent job at hitting the ground running with VoLTE launch but they still had a lot of issues in the first year or so.
As for Fallback due to weak LTE, that should be working anywhere "fallback" is enabled period. If a user loses connection to the LTE network during a VoLTE call, the network hands off the call to the circuit-switched network. I'd actually read a document by 3GPP that outlined that's how fallback is intended to work. The main reason I see it not working is due to some sort of hand-off issue between networks, possibly because the device fails to "set-up" the hand-off to UMTS/H+, and as a result, hangs on to LTE until the signal is lost and call is dropped. That's how I've seen it happen many times.
I'm not doubting that you're right GusHerb, but it could vary per market and device, but I've experienced both scenarios.
Sent from my SAMSUNG-SM-G890A using HoFo mobile app
I just turned it off and use regular umts voice
I've had to disable VoLTE on AT&T when back home. I've not had an issue with Verizon as of late.
I usually leave VoLTE off. Too often if the service gets weak, I can hear the person but they cannot hear me. So it's just dead air. It's frustrating and it doesn't happen on 4G. In those cases, why doesn't it drop down to 4G?
I honestly don't hear a big difference between 4G, wifi calling, or VoLTE at all to other at&t customers. It usually sounds good regardless. Now when I talk to someone on Verizon cdma, however, that is painful.
Verizon Wireless: 2001-2004 & 2011-2013
Cingular/AT&T: 2004-2006 & 2008-2009 & 2013-Present
Sprint: 2006-2007 & 2009-2011
I think call quality is subjective depending on the user, Airb330. I absolutely hate talking on the phone unless it's AMR-WB, just because the increased fidelity is noticeable to me. Granted, I'm an Audio Engineer by passion and profession, so I've got attentive ears myself, but I've spoken with my wife, mother, and 2 close friends, and when AMR-WB is active on both ends, the callers notice and let me know that they notice. Makes it much easier to discern what's being said on both ends.
The only time I've had VoLTE give me dead air is when a handoff from LTE to H+/UMTS doesn't go as planned, and I lose the call in those cases. Not sure why the drop-down to H+/UMTS isn't working for you, and as GusHerb said, it could be something that AT&T just doesn't have implemented by design.