I gave my wife my perfectly functioning 6 and used her upgrade for a 6S. The 6 was my first iPhone, and made me wish I switched to the iPhone long ago. The 6S makes me miss my Samsung Galaxy S3 that I had for 3+ years prior to the 6. - Every time I flip to the camera, there is a 5-10 second screen freeze before the camera wakes up and I can do anything. - Once a week my phone's screen will stay black when I'm receiving an incoming call; I cannot answer the call, I cannot wake the screen up. I have to restart the phone to be able to use it. - Infrequently unable to access the music on my device through the Music app (never-ending app load) and have to quit out of the app and restart it - Generally laggy Are these common problems? I know there are a lot of complaints about iOS9 and 6S, but I don't see solutions.