I traveled to Enid, OK and tried to reach one of my international contacts but message said a wrong code was dialed. Multiple tries and an hour with various VZ support people failed to resolve the issue. Finally borrowed my friends AT&T phone and call went right through. Anyone know how to get my S6 to make the call on VZ? If there is a restriction, how do I find it because VZ didn't know of one and AT&T couldn't or wouldn't tell me anything.