Best softphone out there ***edit***

Finally a soft-phone that doesnt drain your battery in 1 hour. But for the love of god!! Pleeeeaaase give us decent ringtones.
***edit***. After a few days, it turns out its not so great. The push notification doesnt always work answering a call takes so long most of the time incoming calls end up in the voicemail. Not business grade a all. Too bad.

Tarantitaticule about Groundwire: VoIP SIP Softphone, v3.0.5