So my friend is selling his iphone brand new from fido. i want to buy it off him but i have a contract with Rogers for my Blackberry Pearl.
So if i unlock his Iphone from Fido and put my sim card in that iphone will it work fine?

I have a student plan contract on my blackberry Pearl and if i get an iphone i want to change it to a Data Plan, will rogers be pissed what i did

Not completly sure how this unlocking phones business works?
any help would be good