Before downloading you have to do the following steps:
1. Click Options button (circle button with some tools image) in the sjphone
2. A new menu appears. Click profile in the upper part and then the New button at the bottom.
3. A new menu appears. Click Create New Profile and fill the gaps:
a. Profile Name----> what you want
b. File Name -----> it fills itself when you write the profile name
c. Profile Type ---->Calls through SIP proxy
and then click OK
4. Another new menu appears
4.1 General ----> Do not touch
4.2 Initialization ---> Do not touch
4.3 SIP Proxy
Proxy Domain: Fill with the proxy name or the IP address given by your provider . Port is usually blank or 5060
User Domain: Fill with the user domain name or the IP address given by your provider. Usually the same as proxy domain.
You should check also : Register with proxy and Proxy is strict outbound and Unregister contact address only. The others do not check. Proxy for NAT with blank is enough. Everything as you can see in the following image.
4.4 Advanced ----> Optional but can be interesting You can configure the "Voice mail number or address". This is usually given by the sip provider and is the number we call to hear our voicemail.
4.5 DTMF ----> Do not touch
4.6 STUN -----> Do not touch
click OK
5. Last screen: service
It ask you about:
a. Account: Your personal account
b. Password: Your password
click OK
6. then OK again and the configuration is completed.