Archived reference: Symbian^3 Developer Library v1.0 (2010), “Internet Telephone Settings Configuration 3.1” – Nokia Corporation.
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Symbian^3 v1.0 has known memory leaks with long SIP registrations (over 24 hours). If you experience freezes, set your registration expiry to 3600 seconds (1 hour) via your provider’s web interface – the phone does not expose this setting directly. sip voip 3 1 settings symbian 3 v1 0 en full
Before using the advanced app, you must create a standard connection profile: Nokia VoIP Symbian SIP Setup VoIP Settings Configuration Archived reference: Symbian^3 Developer Library v1
Here’s a structured feature sheet: