The Nanu app plays sponsored ads before a call, letting users make free calls to other app users, as well as landlines and mobiles not using the app.
Curious about Wi-Fi calling and what it entails? CNET has the rundown on what you need to know.
If you're concerned you may be the unwitting victim of the firm's exploits, download this free tool.
Developers hoping to build services for people using Internet.org -- which provides free basic Web services via mobile -- must follow three principles meant to bring more people online.
Commentary: A 2012 law forbids the states' Public Utility Commission from regulating Internet services. But the pending merger of ISPs could allow the opportunity to do just that.
Mobile World Congress has officially begun in Barcelona, Spain. Here's all the stuff you missed at the first day of the show.
The road to crafting lasting regulation to protect the open Internet has had several twists and turns. As the FCC prepares a vote to adopt new rules, CNET takes a look back to the origins of the current debate.
What we want out of the first Lumia phone with Microsoft's name attached isn't rocket science. It's for the company to give those entry-level specs a break.
The popular messaging app appears to have switched on its promised voice calling feature, with some users reporting the functionality appearing in the latest app build.
Windows 10 on smartphones will look a little cleaner and behave a little better than before, but the biggest changes Microsoft made to its all-in-one OS come from the phone, not the other way around.