I was hoping to see something that was comparable to the Lumia 930/Icon on or coming to AT&T by now, but that's not happening.  The 830 is supposed to be coming, but that's a lateral shift, not an upgrade.  Come on, AT&T, where's our new flagship phone?  Where's the heavy-hitter that's going to repl

I am using a Lumia 950 Dual SIM (from Microsoft store and unlocked, non-AT&T version) with an AT&T SIM. The carrier logo shows "LTE" and the LTE data works well. However, when I call to another AT&T iPhone 6 (which is on LTE), the carrier logo changes to "4G", and the VoLTE (HD Voice) seems not work