cryptomix

free sip-client from Linphone open source code

Its free sip-client from Linphone open source code .

Offers free audio/video calls and text messaging over wifi or 3g/4g internet connection.Work with varios sip-servers ( asterisk, sipxcom and etc..)

key features:

* high definition audio and video calls .

* audio conference calls with various participants

* pictures and file sharing

* secure communication (TLS, SRTP, ZRTP support)