mmmmm no.

The correct answer is http://www.forum.nokia.com/info/sw.nokia.com/id/b1c361a2-7eb2-4853-8c0c-d2f54e184237/SIP_VoIP_3_1_Settings_v2_0_en.sis.html

At the end there is a nokia client...

I have a E65 and a N82. Now a friend of mine just bought a E55 and turn to me for help. This is a Brand New phone bought in the NOKIA STORE.

There are SIP settings and I manage to register the...

http://www.forum.nokia.com/info/sw.nokia.com/id/d476061e-90ca-42e9-b3ea-1a852f3808ec/SIP_VoIP_Settings.html

This adds configuration of STUN to N82. I am still playing with it...