Can I buy the iPhone 5 in USA and then bring it back up to Canada to use?

Can I buy the iPhone 5 in USA and then bring it back up to Canada to use?

Added (1). The reason being its just so much cheaper to buy it in the states… But i'm worried that i won't be able to use my rogers sim card

Siri still won't work, if thats what you're thinking.

Yes you can if you are careful at customs,
but reginal services like SIRI maps won't work properly,
software update problem may occur