Linphone offers to manage your SIP contacts. Start the address book with +. An empty list window opens. Click to add a contact.
The following entries need to be made for a valid contact:
Enter the name of your contact. This may be a full name, but you can also use a nickname here. Choose something you easily remember this person as. If you choose to see this person's online status, this name is shown in the tab of the main window.
Enter a valid SIP address for your contact.
If needed, enter the proxy to use for this particular connection. In most cases, this would just be the SIP address of the SIP server you use.
Your subscribe policy determines whether your presence or absence can be tracked by others.
To call any contact from the address book, select this contact with the mouse, click to make the address appear in the address field of the main window, and start the call with as usual.