Incorrect. The iPhone 4S had a SIM card with Verizon, for roaming internationally.
By roaming do you mean on Verizon's network, if that's the case it's pretty much useless. Unless you have money to throw away. I'm not talking about roaming here, I'm talking about the ability to simply use a carrier from another country without having to deal with Verizon.
Either way, if anybody wants a phone that work will internationally I'd go with anything after iPhone 5.