The popular messaging service is taking on the likes of Skype and Viber with its new VoIP service.
Sprint plans to follow T-Mobile's lead and roll out Wi-Fi calling options, but just on two phones to begin with.
A mere week after launching a new direct calling service, Viber is expanding yet again.
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.
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.
Skype's Android app has received a much-needed overhaul, adding a new look and greatly improved video call quality.
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.
Google Voice users bummed by the lack of call features in Hangouts have cause to rejoice.
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.
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.