Switching a galaxy s7 from Verizon to AT&T and I cant get the voice calls to work.

[AC Question]

I updated the APN settings and LTE is working. I have data and texts. I don't see a way to input an unlock code. I get a warning that says "SIM card not from Verizon wireless" but clicking on it does nothing.

 

[bennett22]

sounds like it's not unlocked for other carriers. or if you had it unlocked, it didn't fully take?

 

[Enverdaz]

I updated the APN settings and LTE is working. I have data and texts. I don't see a way to input an unlock code. I get a warning that says "SIM card not from Verizon wireless" but clicking on it does nothing.

Which edition of the S7 do you have. The ONLY one that it is possible to switch from Verizon to AT&T on is the Carrier Unbranded / Unlocked edition, the SM-G930U & SM-G935U.
The carrier branded Verizon has a Snapdragon 820 with only the CDMA radio
The carrier branded AT&T has a GSM radio
Only the Unlocked editions have both radios available, allowing for use of any GSM or any CDMA Sim card.
The G930A is not the same as the G930V in terms of the radios.
Hope this helps

Samsung Galaxy S7 G930U

 

[SlothStyle3]

Thank You! I can stop trying now haha.