Android and Apple's iOS rule the roost, but a bevy of others gun for the number three slot.
Articles about Mobile OS
The iPhone and iPad giant is dishing out its latest mobile operating system, iOS 8, with the latest features and greater support for enterprise users.
Apple's latest mobile operating system begins its worldwide rollout Wednesday. Here's how to get it first.
The next version of Internet Explorer that will be included in Windows Threshold could get extension support, as well as task-completion smarts from Bing.
The new Apple software and new hardware for it have many features that could present problems for enterprises if IT doesn't prepare.
Number three smartphone maker says Android offers more opportunity for vendors to do something different.
A handful of handset makers have jumped on board Android One to deliver new low-cost phones in a range of sizes and specs different to the three launched in India today.
Google is bringing Android back under its control thanks to a new hardware and software combination.
No-one will deny that Cupertino's products are fashionable and beautifully-designed. But that doesn't make them enterprise-grade.
Microsoft may be phasing out usage of both 'Nokia' and 'Windows Phone' in its advertising and marketing materials as soon as this holiday season.
A plan to introduce a scheme for national mobile roaming across the UK seems to have been rejected.
One third-party case maker says it has the specifications for the larger 5.5-inch iPhone, a phablet-sized device. Will it cannibalize iPad mini sales?
The iCloud hack has cast Apple in a poor security light. Yes, the company dropped the ball on this one, but it is a leader in many other ways.
I know it isn't released yet and it's too late for Apple to fix the iPhone 6, but Apple has the opportunity to correct old mistakes (and new ones) at the same time for the iPhone 7.
Microsoft's next major Windows release is rumored to have some connection to a 'Windows as a Service' concept. But WaaS may not be what many think.
Timing is everything, and if Apple is planning a smartphone payment system, it's making a move at the right time.