I used Fring with the SIP service VoIPBuster and it worked every time I used it. However, I stopped using it for a while and there were many updates to it. I recently decided to use it just about 2 days ago. I tried using the free SIP calling service provided by VoIPBuster, but it did not work. I called my cellphone, but it did not ring. Is anyone else experiencing these issues with Fring and the SIP services from VoIPStunt or VoIPBuster? I am on the 3.0 Firmware. Thanks. Any help will be appreciated.