My Iphone 4 won't go past the apple screen?

I recently have jailbroken my phone, and was tryingto get Siri for my phone. I rebooted it, and now it won't go past. Even worse, I can't even turn it off! What can I do to fix this?

You've propably just blown a fuse, just put in the microwave or oven on light heat to makes sure the fuse melts together again.

Enter DFU>Restore to iOS 6.1.3>Wait for new jailbreak, and all your current settings lost. No other fixes. If the iPhone 4 don't get ios7, you probably will never be able to jailbreak it again.

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