Sipmobile Windows Phone

Sipmobile for Windows Phone is an Voice Over IP (VOIP) / SIP client for Windows Phone 8 and 8.1. 

You can download application here:

The app was not found in the store. 🙁

Main features:

  1. Free calls to USA and Canada;
  2. Audio/video calls;
  3. Online and offline messages;
  4. Push notifications;
  5. Secure communications with cryptographic software;
  6. Supports modern codecs (Opus, WP8) for better audio/video quality;
  7. Picture sharing;
  8. Compatible with Sipmobile iOS and Sipmobile Android.