[candyflossangels]

I have a contract with Orange for my Blackberry Curve 8520, and I bought a new iPhone 3GS (so I know a sim card will fit in it) off eBay recently (as my iTouch broke and I quite like iPhones...didn't really think these issues through before I bought it!).

I quite want to use it, but don't want to have to take out a whole new contract, obviously.

My current contract includes a data plan (250mb), as far as I know not a Blackberry specific one, but it may be one, unlimited texts and 600 minutes. Can I insert this sim card into the iPhone to use it?

I imagine texting and calling will work, but it's the internet I'm slightly worried about.

And I know you have to activate iPhones when they're new. Will I have to do that?

Basically, if someone could help me and guide me through what to do, that would be wonderful, thank you!