Someone

I have a Nokia 3109c mobile phone , and I would like to use it with xgnokii tool.
What model have I to write into the /etc/gnokiirc file?

If I use 3109 or 3109c I receive a message error: model not supported
If I use 3109 or 3109c I receive a message error: connection or function not supported 

Thanks for your help
Mario Milani