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Hello my friend,this is firmware problem.You can try update or reinstall firmware by your own or take it to a repair shop.For updating the firmware you will
need the your phone`s USB cable, a computer,the firmware,flash tool(like PST).But if you don't want to loose your warranty or to risk it take it to repair shop.
Connect your phone to the computer and open iTunes. Hold both the home key and the power button until the iPhone turns off. Continue to hold them both for 5 more seconds. Release the power button but continue to hold the home button for 10 - 15 more seconds. I tunes should detect the phone in DFU mode. Restore firmware from this mode.