Hey guys, So i recently bought an iPhone 4s from at&t (my american phone was due for an upgrade), but i've recently moved to canada for school, but i do come back down to the states for breaks etc. I factory unlocked the phone in hopes of using it in both Canada as well as the states. I was wondering if this is possible? ALso, i am planning to put a prepaid sim card in my phone. It's a "smartphone plan" from Virgin Mobile (Canada), about $35 a month for talk /text/some data, and i assumed this would all work out fine.. Just wondering if there's anything i should be worried about and whether or not all of this will work out. thanks!