i had the exact same problem. Try holding down the power key, home button, and volume down for 30-45 seconds. This is what you do when you want to download a custom os. After that, use the volume rocker to go down to "cancel (restart phone). This is what i did and it worked fine after that. Good luck!
I had the exact same problem. Try holding down the power key, home button, and volume down for 30-45 seconds. This is what you do when you want to download a custom OS. After that, use the volume rocker to go down to "Cancel (restart phone). This is what I did and it worked fine after that. Good luck!