eu mai am problema asta dupa upgrade, insa doar pe iPad:
https://discussions.apple.com/thread/6546549
in rest, probleme curg, cam astea sunt astea usual cu ios 8
http://www.businessinsider.com/ios-8-bugs-and-issues-frustrating-users-2014-9
iPhone and iPad owners who updated to iOS 8 are complaining about issues with third-party keyboards, Apple's own native keyboard, iMessage glitches, multitasking gestures, frequent crashes of the Settings app, laggy notifications, and overall sluggishness. Other problems include reported issues with the Notification Center, the Twitter app, formatting issues with dialogue boxes, intermittent Wi-Fi, and issues with the audio from various music apps layering on top of one another.
It's been five days since Apple launched iOS 8, however, and with most complaints focusing on bugs rather than the aesthetics and look of the operating system (as was the case with iOS 7's introduction), Apple will most likely push out an update sooner rather than later.