The app will shortly be avialble for iOS and Windows phone, Nanu said
Signal is compatible with RedPhone, its Android sibling, and scrambles voice calls placed via the iPhone.
You can now use Hangouts to call your contacts via the Google Voice website even if you don't have a Google+ account.
Microsoft's Skype team said the new iPhone app version, due in a week, will finally be on a par with its Android and iOS counterparts. In particular, the pesky offline messaging bugs will be solved, the team promises.
Carrying voice calls over LTE means faster call setup, the carrier said. And it beats AT&T's own announcement, too.
Talking to a bunch of your buds just got a whole lot less costly for Skype users.
The court's ruling raises questions about the FCC's authority to require VoIP providers to compete calls and carry all traffic.
Verizon is converting some traditional telephone customers to VoIP without their permission, advocacy group says.