Open source SIP/VoIP-client for the use with a pilot-call account. The client is preconfigured and only required a username and password to be entered. Both settings can be found in on the Pilot-Call website in MyAccount. Calls between two Pilot-Call customers via voip are free of charge, all other calls at a low rate.Features: direct access to the mobile phone address book, NAT traversal, noise reduction, echo reduction.