Thank you all for the useful information !!!!! One last question ! I am looking now at a comparison chart of all the voip providers and I see that there are couple of them that provide free calling to my country (Bulgaria). Has someone heard of 'low-rate voip' or 'voipshark' or '12voip.com' . My question is - do you think that I can make these work on the n800 exactly the same way like with 'voipdiscount' or 'voipbuster' or any other ?????