My iphone 5s went dead some minutes ago with about 60% battery, it wouldn't turn on by simply holding down the power button, so I searched online and found out about trying to turn it on by holding both power and home buttons. It finally turned on but now it was asking me to connect it to Itunes, which I did and now it tells me it has to restore the iphone which is what iam doing right now. Question is, why did this happen? Even if it works fine after the restoration should I be alarmed and send it to apple? Nothing like this ever happened to the iphone or to my ipad. Thanks!