SIPphone's New Callback Service, Gizmo5

Michael Robertson’s portfolio of companies might not have massive market share, but it still keeps pushing the envelope. Earlier this week, his MP3Tunes introduced a new locker sync. And now his SIPphone is getting ready to launch Gizmo5, a mobile callback and IM client for mobile handsets. It’s the latest offering from SIPphone, which makes Gizmo Project IM and Voice Client and Gizmo for WiFi-enabled mobile phones that use S60 phones.

Jason Droege, who runs SIPphone, wrote to us in an email:

Gizmo for Mobile is a java application that uses the data connection of the phone to transfer IMs and initiate call back. Because the vast majority of the world’s phones have no wifi, we wanted to provide the presence, file transfer, IM and low cost calling features available through Gizmo Project, but call back is the easiest way to do this on a mobile phone if calls can’t be passed over wifi.

If you want to try it out on your mobile browser, go to and download the client. Sign in and you are all set to go. This new offering puts them in direct competition with Sequoia Capital-backed Jajah and other services such as mig33.

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