Android and Apple's iOS rule the roost, but a bevy of others gun for the number three slot.
Articles about Mobile OS
It's the first of the month, which means it's time for another look at the state of the PC and mobile markets, using the latest data from two large web analytics firms.
Microsoft has filed a contract dispute suit against Samsung over Android patent-licensing royalties.
Microsoft is still on track to deliver a second update to Windows 8.1 in August. But don't expect it to include any major features or to be mandatory.
BlackBerry said BBM for Windows retains the native user experience and modern design of the Windows UI.
Microsoft will make the first update to Windows Phone 8.1 available to developers the week of August 4. Here's what to expect in that update, feature-wise.
Microsoft is releasing Cortana, its personal digital assistant for Windows Phone, in beta in China and the U.K., and in 'alpha' form in Australia, Canada and India.
After sitting at around 1 percent or less of marketshare in many major markets around the world, the Kantar Worldpanel has decided to stop counting BlackBerry as a separate line item, and lump it into the Others category.
The automotive giant seeks to ditch its trusty BlackBerry devices in favor of iPhones, as part of a "global deployment" for its employees.
Microsoft is rolling out new OneNote features for iPhones, iPads and Macs, as well as first steps on the promised support for OneDrive for Business for Macs.
Faster growth in the Middle East, Africa, and Latin America saw the company's shipments rise year-over-year by 62 percent, but Western markets still shy away.
Does Tizen have a future, or is it going to be another unlaunched Linux-based mobile operating system?
Amazon's Fire Phone has the design quality you might expect from Apple's iPhone, or Samsung's Galaxy S5. It's a strong contender in the Android space, even if it misses a few enterprise targets.
The Fire Phone has one flagship feature: a display with three-dimensional aspects. Other software elements in the retail giant's debut smartphone are gimmicky at best. This device feels like a work in progress.
It's the Android-rival mobile operating system that never was. At least for now, anyway.
We could not live without our mobile phones and texting, according to Ofcom's latest survey of consumer habits.