One of the biggest rivals for Skype in the VoIP app scene is Viber, with over 200 million users accessing the VoIP service. Today, well over a year since Viber released its first Windows Phone app ...

There’s a new VoIP app in the market you might not have heard of. It works seamlessly on 2G, and you can call non-app users including landlines and mobile phone numbers. The name’s nanu.