iOS 9.2 Problems
iOS 9.2 will fix iOS 9 problems, you can count on that part, but you can also count on iOS 9.2 problems for iPhone, iPad and iPod touch.
Ever single iOS update, from iOS 6 to iOS 9.1, has caused problems. Some updates have been worse than others but there are always complaints, always issues. iOS 9.2 won't be any different and that's why you'll want to prepare for the update ahead of its release.
Apple's testing should wipe out the biggest bugs but expect issues with battery, Wi-Fi, Bluetooth, apps, and so on.
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