My iPhone 4 crashed after jailbeak and All my apps disappeared. What do I do

My iphone is less than a year old, and all the apps went away after my friends tried to jailbreak it. I don't know what to do!

Added (1). Also, it wasn't just the apps I bought, it was All the apps. (contacts, photos, messages, calling, ect.) All that's left is the dumb apps like Passbook and stuff that I never used.

You can reinstall them all from the app store or iTunes without having to pay again; just log in with the same Apple ID you used before.

I think iTunes keeps track of apps you've bought. After you get it going again, or replace it… Sign in with the same name, and download them again for free.

Check if you have a backup on your iTunes

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