My iPhone 4S 32GB is on iOS 8.3, and since iOS 8 a lot of my iPhone features ceased to work: iMessage, Bluetooth, Battery life, EVEN THE CAMERA DOESN'T WORK, low performance, slow Wi-Fi. I need all these without sacrificing function. The iPhone is a SMARTphone and it has to stay this way. I have no other solution but to rollback to iOS 7 or better, iOS 6. You might say that it is not possible, but I accept any solution to rollback the iOS. My iPhone is almost bricked and it is driving me nuts. I really need the iPhone for school and stuff etc. since our classroom relies on Facebook. ANY help is appreciated.