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Lumicall: genuinely free calls for Android
Lumicall
Free and convenient app for encrypted phone calls from Android. Uses the SIP protocol to interoperate with other apps and corporate telephone systems.
See ZRTP in action
See how a ZRTP-secure phone call is made with Lumicall.
Free Software
Lumicall is free software licensed under the GNU General Public License v2.0.
Github source code
Source code, issue tracking and community collaboration takes place on our Github project page.
Build your own network
Read the Real-Time Communications (RTC) Quick Start Guide to find out how you can run a SIP service with Lumicall.