Blog: Mobile Walkie-Talkie Or A Skype-Like App Based On SIP Protocol

The R&D part of our mobile division always comes up with new ideas and smart solutions. While experimenting with VOIP technologies and reimagining routing engines, they created a very special app that enables you to call people on their phones, anywhere in the world for free.


The app supports iOS and Android platforms, and it makes calls to a mobile device by using its ID (or UDID). All you need is Internet connection and the app installed on your mobile device. Intrigued? Watch this video to see all the great things you can do with the app.

The team is already working on video phone calls. As for now you can save money on calls and stay in touch with friends and family.

OpenSIPS (Open SIP Server) was used as the main technology for the app. It’s an Open Source implementation of a SIP server. But OpenSIPS is more than a SIP proxy/router as it includes application-level functionalities. OpenSIPS, as a SIP server, is the core component of any SIP-based VoIP solution. With a very flexible and customizable routing engine, OpenSIPS ‘unifies voice, video, IM and presence services in a highly efficient way, thanks to its scalable (modular) design.