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You've got a call on Line, too: Line announces voice calls to traditional phones

The popular messaging service is taking on the likes of Skype and Viber with its new VoIP service.

Sprint to launch Wi-Fi calling, but slowly

Sprint plans to follow T-Mobile's lead and roll out Wi-Fi calling options, but just on two phones to begin with.

Modern-style Viber app lands on Windows 8 and Windows RT

A mere week after launching a new direct calling service, Viber is expanding yet again.

viber out

Viber launches 'Viber Out' low-cost phone calls: How do rates compare to Skype?

Viber's new low-cost phone calling option is a steal if you're dialing phones in the U.S., but do you homework if you're making international calls.

Gogo adds voice calls, texting support to in-flight service

Passengers in flight could make voice calls and exchange text messages using a new service from Gogo, but that doesn't mean your seatmate will be able to blab all through your next flight.

Revamped Skype app for Android tablets oozes Windows-esque style

Skype's Android app has received a much-needed overhaul, adding a new look and greatly improved video call quality.

TextNow taps VoIP for $19 monthly smartphone plans

TextNow is jumping into the low-cost wireless service fray, with smartphone plans that start at $19 per month for data-based service that relies on Voice over IP for calls.

Phone calls return to Gmail thanks to a Hangouts upgrade

Google Voice users bummed by the lack of call features in Hangouts have cause to rejoice.

Voice-over-LTE deals with slow start, rival telephony apps

The technology to implement Voice-over-LTE (VoLTE) is maturing, but mobile operators won't roll out telephony services in earnest until 2015. At the same time apps like Skype and Fring are growing quickly in popularity, according to Infonetics Research.

Vulnerabilities found in code library used by encrypted phone call apps

ZRTPCPP, an open-source library that's used by several applications offering end-to-end encrypted phone calls, contained three vulnerabilities that could have enabled arbitrary code execution and denial-of-service attacks, according to researchers from security firm Azimuth Security.