Must-have companion for heavy phone users

The software has almost all the features you can think of. I particularly like the auto call recording. It is really impressive how they managed to have so many functions in one software. As additional features I would like to see I quote (1) the ability to automatically transfer GSM calls to SIP, and (2) a way to replace iPhones phone client by Groundwire.

Marco Figueiredo about Groundwire: VoIP SIP Softphone, v2.4