Can i buy an Iphone 5 in USA but use it in Brazil?

I want to buy an iphone 5 when i go to USA, and wanted to know when i get back to brazil will i be able to use it there? And by use i mean like iphone 4 and 4s there was a slot where you can insert a simcard so you can call in the country you moved or visited too. Please REPLY As soon as possible

Yes you will still be able to insert a new simcard, however depending on where you buy it from it may be locked to the network on which it is bought on. For example if you buy it on 02 you might only be able to use 02 simcard with it unless you get it unlocked. They will tell you if it is locked to a certain network when you buy it in the shop, they should also be able to confirm that you can get a new sim for a different country. Hope this helped.