Unlocked my 4s


Jun 20, 2009
Ohio, USA
Called verizon today, and requested my iPhone 4s to be unlocked for outside the states usage, the rep was so helpful and unlocked my phone for me, explained that what I need to do now is to pop in my gsm card and connect to iTunes to sync the phone ( I believe it's for activation purposes , the only issue Now is ,if I am using a prepaid company sim card within the states not AT&T nor t-mobile, how can I switch between gsm and CDMA , I understand in a country that doesn't support CDMA the phone will switch, but how about a country with both options ?
Any idea ?