As predicted, iOS 8.0.1 is now in the hands of carrier partners for testing, a source says. The person notes that the update fixes a variety of bugs left in the OS for its debut last week. For example, it copes with glitches in the Phone app, which can affect call forwarding, and cause freezes when accessing Visual Voicemail.
Also dealt with is the keypad not appearing for iCloud Keychain verification codes, and Safari refusing to play videos. AirDrop support for Passbook has been restored, and VPN profiles should install properly.
The update should also fix a variety of unmentioned issues. People have, for instance, been complaining about unstable Wi-Fi connections and poor battery life, issues that recur frequently with iOS upgrades. It could also theoretically improve performance on older devices such as the iPhone 4S, but Apple may have to prioritize problems.