I have been having problems with my iphone since I updated to the 10.1 or whatever it was called. It is taking the phone much longer to sink with my computer for one thing. Then, the other day, an email came in and the phone cut off the notification sound just as it began. Then, without my touching the phone, it rebooted itself. Today, I uploaded photos from phone to my Mac, but whence I tried to delete some of the uploaded photos on my Mac, they would not delete. Also, their is one photo on my phone that I have uploaded numerous time, yet it always appears as a brand new photo on my phone to be uploaded. I had to upgrade the phone's OS in order for it to work with my Mac's Sierra OS, but I am really sorry I had to do it. There have been nothing but problems since I upgraded.