If you want to route all calls through VoIP by default when connected to Wi-Fi: Go to . Locate the option for Default Call Type . Change it from Voice Call (Cellular) to Internet Call . Troubleshooting Connectivity & NAT Issues
Nokia's native SIP implementation bypasses these issues through deep OS integration:
| Setting Field | Recommended Value | Technical Explanation | | :--- | :--- | :--- | | | Your Wi-Fi IAP (Home/Office) | The stack cannot handover to cellular. | | Public user name | sip:123456@your-server.com | Must include sip: prefix. No spaces. | | Use compression | No | Symbian 3.1 does not support SigComp. | | Registration | Always on | Keeps the UDP binding alive. | | Use security | No | Crucial: v1.0 IPSec fails with most modern servers. | | Proxy server | sip:your-server.com:5060 | Use UDP port 5060. Do not use 5061 (TLS). | | Registrar server | sip:your-server.com:5060 | Same as Proxy for 90% of configurations. |
If using a PC, connect your Nokia via USB cable in or MTP mode and drop the file into the Documents folder.
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Enable STUN server settings in advanced options if supported by your router.
: Set to ://provider.com or leave as SIP (depending on provider requirements). User Name : Your account ID/username. Password : Your SIP account password.
Once the profile is created, open the installed app from your Applications menu:
After saving your settings, return to the SIP profiles list.
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Configure the screen using the parameters below: Core Profile Parameters
Your SIP Extension/ID.