I think you misunderstood what I said, or rather I said it wrong. I put it under the quotes - “black listed” , specifically to differentiate it from the actual blacklisting. I just don’t know how else to call it. What do I mean by it -
Carrier decides that a specific model won’t have access to VoLTE, despite the fact that it has a capable and compliant hardware. More time passes by, it’s even less likely to allow it.
My and other ppl experience on ATT
All Unlocked US version phones
Moto Z Play, Moto Z2 Play, Moto XPE , Sony XZ1 Compact
No matter what trick is tried, they would never have VoLTE. I managed a few times and it worked for a brief second.
Though, these phones were getting phone calls on 3g and had a regular LTE connection for internet browsing.
On the other hand , Moto Z2 Play and Moto XPE had VoLTE on Verizon. Moto Z Play didn’t because it was competng with their own version “Droid Z Play”.
when I tested just recently ATT branded Moto Z2 force (had it sim unlocked) it was flat out denied any kind of connection. Nada. I tried all different ways and it just wouldn’t get the network signal. That one, I can tell was blacklisted for the reasons unknown to me. It had most of the LTE bands and wasn’t stolen since I bought it new months before that and used it on ATT. Maybe,it’s because of the fitmware or bc they had their own Z2 Force version.