Can I bring my brand new iPhone 5 to vietnam?

So yesterday I got a brand new iPhone 5 because my iPhone 4S broke on me suddenly because it wouldn't turn on. I got it replaced and upgraded to the new iPhone 5 after literally negotiating and forcing my parents to get it for me. The question is that would I be able to use it while I'm vietnam. I'm thinking of impressing my vietnamese fiancee in vietnam by having it with me. I think after seeing me with the iPhone she would want to marry me because she would think that I have money. Can I bring my brand new iPhone 5 to vietnam?

Yes, it needs to be GSM phone and unlocked.

I warn you do not go to Ho Chi Minh City.
There are thieves. They could literally cut your hands with a sharp saw/knife.
If you are not going to Ho Chi Minh well. You might as well could bring it. But they are every where.
So watch out.

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