3.1 Check VOIP version on Nokia website

3.2 Download SIP VoIP Settings software

3.3 Install this software to your phone

3.4 After install -> Installat

3.5 Installat ->Sip Voip Sett

3.6 Sip Voip Sett -> NAT firewall settings

3.7 NAT firewall settings -> Domain parameters

3.8 Domain parameters

3.9 NAT

Can not edit the SIP settings ?