iPhone 6s hard reset unsuccessful
My iPhone 6s 64GB was working fine this morning. The battery was at 100%. I was playing Pandora getting ready for work. Suddenly, the music stopped and my phone shut down. I have been unable to turn it back on. I have tried holding the power button for up to 30 seconds. I have also tried holding the home button and power button for up to 60 seconds. I have plugged it into a power source. Nothing has worked. How can I get it to turn back on? Thank you.
Jason
iPhone 6s, iOS 9.3.3