Where to enter unlock code?
I requested and received an unlock code from At&T for a Samsung Galaxy S7. I put a Verizon sim card in the phone, but did not receive a prompt to enter an unlock code when I turned the phone on. I tried to enter the unlock code in the phone dialer, as directed in the instructions I received from ATT to use #0111*unlocknumber# but keep getting a message that only emergency calls are permitted. How do I submit this unlock code?