S7 won't make or receive calls on 4G network


    My S7 started immediately ending all received or dialed calls.  I could not correlate this to any recent change I made.


    T-Mobile tech support walked me through reboots, messing with WiFi calling, connecting to 2G, etc. They eventually agreed to put in a trouble ticket on the network itself.  They didn't know...


    Now, I am connected to 3G/2G auto, with WiFi on, WiFi calling disabled and I can call.  If I go to 4G, it will instantly and always end any telephone calling.


    Thoughts? Help.


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