As stated
here, we HAVE the STUN support now, but this is "Nokia-way" to implement this: add it to new firmware version WITHOUT user interface and additionally with packet data use disabled as default - and this setting is also without user interface.
Result? If I could do VoIP calls over 3G data transfer before, then now the whole application is rendered almost useless, because:
1. STUN settings cannot be applied (which makes impossible to use almost any WLAN)
2. Usage of packet data transfer is disabled by default and there's also no way for user to change it (which, of course, makes 3G/GPRS impossible to use).
And all information you can find on this thing is some kind of **bleep**py "webinar" - a WMV file, which includes some kind of Powerpoint-like presentation and some guy talking behind the screen with voice quality of a phonecall.
I have to admit that I had never been so **bleep** off @Nokia as I am now - even after 8 years of using their products.
388 -> 688 -> 6150 -> 6310 -> 6310i+1100+ E70-1(3.0633.09.04/crippled VoIP)