Why is my iphone 4 stuck on the white apple logo?

My iPhone recently stopped turning on. All it does is give the the white apple logo and it doesn't charge. I've tried everything from connecting it to itunes, and holding the lock and home button.
I really need to fix it because i have all my stuff and i didn't back it up.

If its jailbroken then search YouTube becuz you might be able to unbrick it… The longest my iphone took to turn on was 2-3 minutes and my iphone isn't jailbroken so sometimes it takes a while but you probly waited longer for it to turn on, go to an apple store or something… Hope this helps.

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