It has struggled to find the right payment mechanisms for the App Store, and the iPhone is not available officially on the largest operator, China Mobile, which has 700m of the 1.1bn mobile users in the country and a higher proportion of the best ones.

FORBES: Android, China and Addressable Markets

In the other case, the FTC charged Path, the operator of the eponymous social-networking app, with deceiving its users by collecting personal information from their mobile address books without their knowledge or consent.

FORBES: Don't Be Dumb About Smartphone Privacy