[VoiceOps] T-Mobile Originated Calls - No Ringback

[Carlos Alvarez]

A few people have reported this as a fault on our end.  But I've also heard
it from friends who use T-Mobile and the complainers agree it sometimes
happens to numbers that are not ours.  The complaints originate from Los
Angeles, Vegas, Phoenix, and others.  So it's just more T-Mobile/Sprint
idiocy all over.


On Mon, Jan 31, 2022 at 12:21 PM Alex Balashov <abalashov at evaristesys.com>
wrote:

> I’ve experienced this as a T-Mobile customer in Georgia, at least calling
> my parents locally who are on Verizon. I get +/- 1 ringback tone and then
> dead air until they answer. I was wanting to ask the list if this is a
> “thing” or just a peculiarity of our area.
>
> > On Jan 31, 2022, at 2:05 PM, Gabriel Kuri via VoiceOps <
> voiceops at voiceops.org> wrote:
> >
> > I'm not sure if this has come up here before, I couldn't find anything
> specific, but I'm seeing an issue where calls originating from T-Mobile to
> other carriers are not generating ringback. The call is indeed ringing on
> the other end, but on the T-Mobile phone, it's just dead air until the
> person on the other end answers the call. It's not all calls, but it is
> reproducible to certain phone numbers and reproducible using various
> T-Mobile customers. It's not limited to a single phone T-Mobile
> number/customer. Further troubleshooting has shown that calls from other
> providers (ie AT&T, Verizon Wireless) do not have this problem to the same
> numbers the issue can be reproduced from T-Mobile. It's only calls from
> T-Mobile numbers to other phone numbers outside of T-Mobile so far.
> >
> > The no ringback issue seems to occur whether you're on wifi calling or
> on a cell tower. All of the T-Mobile users we can reproduce the issue with
> are in Southern California. Not sure if any of this matters.
> >
> > I tried to deal with customer service and opened a ticket that
> supposedly was escalated to engineering, but of course that fell on deaf
> ears and the response I got was basically "Can't reproduce, it's not our
> problem" 8-/ ...
> >
> > Any T-Mobile engineers on this list that could help or any
> recommendations on how to raise attention to this problem to someone at
> T-Mobile with a clue?
> >
> > Gabe
> >
> >
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>
> --
> Alex Balashov | Principal | Evariste Systems LLC
>
> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
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>
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