iOS 10.0.3 fixes bugs including an issue where some users could temporarily lose cellular connectivity.
iOS 10.0 | iOS 10.1
iOS’s Mail app
Demonstration of proof-of-concept attack on iOS’s Mail app. Apple was notified about technical details of this vulnerability on 2015-01-15
Hidden Features of iOS 8 Hidden Features of iOS8 : The Top 10 Hidden Features of iOS 8 : Top 5 Secret