Would my iPhone 5s work in vietnam?

I just got an brand new iPhone 5s yesterday. I'm going to vietnam sometime soon and I want to know if my iPhone would work over there. I'm with Verizon and my phone is 4g capable and I get 4g in some areas here in san jose. Would my iPhone work in vietnam?

Take out your american card and put in a VN sim. Simple and cheap

there are new iphones everywhere here. No problems for you