Why is my iPhone isn't working after upgrading to iOS 7?

Awhile ago I upgraded my phone to iOS 7 from a torrent. When I finished upgrading, my phone showed a blank(white) screen with a 1/2 inch black stripe in the middle and i can't turn it off and on as well. Suddenly my phone didn't stop to blink. I've decided to connect to itunes but I can't restore it because I need to turn off the find my iphone. How can I turn off when i can't control my phone. I can't tap/swipe/press or anything. What should i do? Help. I'm so depressed. This is because of curiosity about ios7!

You can try a hard reset, which is holding down the power button and the home key for 30+ seconds. My phone wouldn't do anything not even turn on and this work for me. It's worth a shot.

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