Haven't seen this anywhere so I thought I would post it, service mostly aimed for USA, Canada, China, Singapore, Hong Kong,Thailand.
Log on via wifi web browser on N80 or home computer to make free or cheap calls
www jajah dot com
Nothing to download, its a web page based Internet Telephony provider, after you sign up all you do is enter Your phone number, Your friends number on the webpage and then both phones will ring(mobile or landline numbers). It uses your regular mobile or landline #'s no sip numbers used.
If you and your friend are both Jajah users then the call will be free, if your friends aren't signed up then you will be subject to different rates depending on the location. Just like with "Truphone or Skype" credits can be purchased from them...take a look at their rates and you be the judge.
Free Calls w/ the following:
FREE calls between JAJAH users
Calls between JAJAH users are FREE under the following conditions: You and your friends have to use mobile or landline phone in Zone 1 (USA, Canada, China, Singapore, Hong Kong) or a landline phone in Zone 2 (mainly Europe, Australia & New Zealand, Taiwan)
Your friend's phone number must be registered with JAJAH
Your friend's account must be "active" (an account will become inactive after two weeks of no operation, ie. a free call, a cheap call or sending a text message)
You have not exceeded the FAIR USE policy: 1000 minutes a month, 300 minutes a week, 60 minutes a day