This is weird. A sim card should not stop you from accessing Wifi Calling. The only recommendation for Wifi Calling is you go through the wifi calling settings on the device and complete the mandatory setup which tells the network which device you ha...
Hmm this seems like an active device issue. I know when you switch from the main phone on your account and you add another different type of phone, the network can sometimes have issues. Remember iPhones use APN's they are just hidden on the device. ...
For the record I did not have to upgrade anything on my network except change the NIC settings, and i was getting good speeds, but there was a lot of noise on the line while testing, so replacing all my cabling and my switch was a personal choice. It...
