Hi, mine used iPhone 5 16gb, so far so good using ios 8, but after i update to ios 9 even 9.0.1 and 9.0.2, i had some problems
1. My old videos which in portrait mode, not play in full screen.
2. After i playing a game with landscape mode eg. CoC, my screen wont rotate automatically even i locked my rotating mode.
3. My battery drain so fast.
sorry my bad English. hope to hear some solution thanks