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.
Now that Google has finally rolled Voice into the existing Hangouts app, there are a few settings you may want to adjust for a better calling and texting experience.
The World Wide Web is a smashing technological success. But the man who invented it wants it to break down more cultural barriers, thwart government snooping, and let the Web run applications not just house documents.
Android users -- at least those in Canada -- can now try out actual voice calls through Facebook thanks to an update to the Messenger app.
New CPUs and a better-than-HD screen make this a 2.8-pound ultrabook a top crossover contender.
The messaging application appears to be already testing VoIP features on the iPhone.
Though the Plantronics Calisto Pro Series is easy to use and has excellent sound quality, we ultimately wanted more cell phone and VoIP integration.
Pricing not available
Skype for Windows Phone is a simple and stable app for free video calls and messaging, but poor video quality will disappoint power users.
Japan-based messaging and VoIP calling service Line hopes the cute Sanrio character will entice US users to check out its mobile messaging app.