Can i be upgraded to an iPhone?

I have a blackberry 9330 and i have my upgrade in august i really want an iphone! I think i pay 18£ per month for my contract now and the original phone was free. Will i be able to upgrade to a iPhone 4s? And will it be more expensive?

Trust me, you don't want an iphone. Get an android, they give you much more options for apps.

Android DON'T give you more app options. But are more on par (the same) as iphone apps. With same number of apps almost. But he is right my friend.

Don't follow the "hype". There are much better phones out there for your money. Such as the Galaxy S3. Or if that is too big for you. The Galaxy S2 or some other android phone.

In my opinion android is the way to go. Iphone contracts are very expensive for what they are where as with android you get a great range of handsets for very good prices. Android also seems to give you a bit more freedom with customization and just little things that make the device that little bit better, personal and unique

I have an iPhone 4S I've also had blackberry and Samsung in the past, if you already want an iPhone but maybe have doubts, ask if you can look at the phone, have a play with it and if your not sure try a Samsung. Let them sell each to you, ask about important things like battery life and what you want your phone to do.
I'm not sure if it'll be more expensive depends where you live, plus new plans come out all the time so do some research. If your not happy with how much you might be spending then shop around see which is cheapest.

Of course it will
You UPGRADE the phone you are using YOU PAY the tariff for that phone

The price paid or tariffs commanded (no demanded) by iPhones… On any every network defy logic and gravity!