Can I take my contract sim out of my iPhone and put it in another phone?

Basically I want to take my sim out of my iphone (I'm on contract) and put it in another phone, is this possible and legit?

Yes, as long as the new phone works with a SIM through your plan, you can switch it.

Well if the sim fits, then you can. Because the SIM card is what has the memory and account information on it. Not the phone itself. So it really doesn't matter. As long as it fits and is compatible with the phone you out it in