After upgrading my iPhone 6 128GB to iOS10 I noticed my phone looses battery faster and shuts down in colder weather, my bluetooth don't communicate with my car anymore, my running application shows some strange results (GPS problem). All in all I'm very dissapointed in new iOS. Instead making things better it obviously making things lot worse than before. I had iPhones from iPhone 2 and they all worked flawlessly. The best thing about iPhone is fantastic hardware-sowtware integration and optimisation and because of that it worked better than any Android phone. IPhone 6 is a great phone, don't get me wrong, but the support and iOS design is poor at least.