My LG Optimus T P509 works fine with WiFi Calling. However the Samsung Galaxy S Blaze 4G T769 does not work (“REG99: Unable to Connect”). Same SIM card, same wifi network, etc. Have been on calls with Support multiple times, no resolution.
Which Wi-Fi Calling Technlogy is used on the Samsung Galaxy S Blaze 4G (UMA, Gan-Lite or IMS)?