Sipmobile for Windows Phone is an Voice Over IP (VOIP) / SIP client for Windows Phone 8 and 8.1.
You can download application here:
- Free calls to USA and Canada;
- Audio/video calls;
- Online and offline messages;
- Push notifications;
- Secure communications with cryptographic software;
- Supports modern codecs (Opus, WP8) for better audio/video quality;
- Picture sharing;
- Compatible with Sipmobile iOS and Sipmobile Android.