How can I get pics from my computer to my Iphone?

I have an iPhone and want a blackberry because my iPhone is super messed up. But i can't break my contract. Well my parents wont want to. So does AT&T let me just change the internet iphone plan to the internet for the blackberry plan? Without breaking any contracts? Pleaseeee heeeelp. I really need to know if i'm going to stay with an iPhone or switch to Blackberry!

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