SIP Phone is one of the latest mobile communication tools in the SIP protocol.
This version of the app is absolutely free and you can connect it to your call center's and take advantage of the program.
Pro version with more features is also available.
A number of features is as follows:
1. online video and voice call
3. Registering multiple accounts from several servers simultaneously
4. Elegant user interface
5. Network encryption settings
6. View Call History
7. Two keyboards: Ava Communications keyboard and Standard keyboard