Dear Jitusj Fyi, on N900 action Voip settings as below on setting address : UN@voiparound.com PW Enabled - Click Advance setting : actionvoip - UN transport : UDP Port : 5060 Discover pub add : click loose rout : click mechanism : alive period : alive Auto dect stun : Click Done - Save You will suceed, Let me know Rgds/Rabi