The SIP protocol (for Session Initiation Protocol) is a protocol allowing, in particular, to open Internet telephony sessions. Zoiper is an easy to use SIP client. With a clear and unequivocal interface, it will only take a few minutes of configuration for the user before being able to take advantage of the service.
The application will allow, via its settings, to register your SIP or IAX account and, once it is connected, to make audio and video calls (either via the numeric keypad, or by the list of its contacts) . Note that the application also allows the consultation of a call log.
The quality of the calls is relatively good and the software includes an anti-echo function allowing you to use the hands-free mode of your smartphone.