My iPhone won't start after i dropped it on the floor?

Hi.today when i was at home i dropped my iphone 3gs with cydia jailbrake in the floor and now it won't start. I have tried the dfu thing and it didn't work the way i tried it and i have been charging it all day and it still won't start! If you know something that can help in anyway please comment, my iphone is really important to me and i need some information on it.

It's. Gone. Buy. The.iPhone. 5.

Charging won't help.give it for repairing

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