Using VoLTE/WiFi calling means that the phone call is initiated on either the LTE bandwidth or WiFi/broadband service bandwidth respectively, depending on your phone settings.
Therefore, if you place a VoLTE on a LTE network that does not show to be strong, the call may not be consistently strong or may have some problems.
If your phone is an android phone, you have the option to change the WiFi calling setting so that WiFi is used instead of LTE. Or alternatively, you can just turn off WiFi calling so that regular phone calls are made, but you would sacrifice some calling quality, as VoLTE and WiFi calling is proven to be much clearer and HD.
Any more questions? Reply back! Or call 611 from your T-Mobile device, or 1800TMOBILE from a non-T-Mobile device. Thanks!
I'm curious why you need a signal booster if you have WiFi?
Our phones don't support wifi calling other than Whatsapp or similar, which
requires call recipient to have the app as well.
I solved my LTE call quality issue by purchasing an older T-mobile cell
booster that only connects to 4G & 3G. We now get great, reliable calling
by simply setting our phone's network preferences to WCDMA / 3G, 4G while
at home. Even away from home my phone seems just as fast on that setting as
it is on LTE, so I seldom switch it back at all. Since I live in
mountainous rural N. CA., I don't think T-Mobile's LTE is as strong here as
they'd like us to believe.