Calling on 3GSM essentially follows the SIP protocol which is the standard for VoIP and uses the h.324m codec for video. Software does exist to allow any SIP complaint device to connect to to a 3GSM network and use video calling however at the moment this would be something that could only be done inside the Vodafone network with knowledge of specific settings so the answer at the moment is no.
I would expect both Vodafone and Telecom (once they launch their video calling next year) to offer software to allow video calling/conferencing - probably aimed at corporates who have big $$ to burn! :-) Opening up a SIP gateway to allow anybody to connect would be seriously cool - there has been a lot of discussion recently on how to interface Asterisk (open source Linux PBX) to a 3G network.
Haha, I'm currently in Hong Kong now.... If you're curious, go to www.three.com.hk (click on the english version if you don't understand chinese), and under "3 services", there is webcall.
If you want, just follow the instructions, and you can video call my mobile, using windows netmeeting (kinda like MSN / IM??). I'll authorise you, my mobile number is 61921865. Greatest thing about it, is that it's free to call, even from NZ< only my video mins locally will be deducted from my plan.
I think the question was not clear enough and that's cause the No answers.
But!
My answer is Yes: you can use your Symbian 3G phone as a webcam via Bluetooth and set it as a default webcam in MSN Messenger.
You can download the trial version software from www.my-symbian.com webpage.
The webcam sw name is : Mobiola Webcam
I tried it already and worked fine with MSN, unfortunately the trial works only for 30 days.
I was using it with ADSL connection, it means my laptop was connected to the internet and I used MSN for chat and video with my 3G phone as a webcam attached (Nokia 6680)
Very handy, I might buy the full version soon.
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