Thanks for the list of BT's.

When i am with out BT and using skype..i don't find any problem at all..
9/10 times its good and with BT 10/10 i hear dual tones.

Is this common problem across all the mobiles that uses skype or just nokia n900?

If it is with nokia i am planning to raise a Bug. There is no point in proudly saying that nokia supports skype with issues and that too after PR 1.3.