My iphone 4 won't open pictures?

I tried to jailbreak it, but it wouldn't load after the final apple symbol so I quit that, and now my phone won't open the pictures people send me. If I save the message to my camera roll I can view it, and I can see the little snapshot in the bubble in the chat, but it just loads for a bit and then turns into a grey screen telling me it's a.pdf or.jpg and how many KB it is. I tried restoring my backup I made before I tried to jailbreak it but that didn't fix it. Also, safari won't open either.

Restore and try re-jailbreaking it again

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