Can I transfer my GoPhone SIM card into an iPhone?

I currently have a 3 year old GoPhone and I'm purchasing an iPhone tomorrow. Would it be possible to transfer my current SIM card into the iPhone and switch to the smartphone plan?

New iPhones such as the 4 and 4 s use micro sims so a normal sim wouldn't fit and the iPhone 5 uses a nano sim which is smaller so you might need to contact your mobile network for the right sim. Unless your getting a 3 or 3GS which uses a normal sim

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