Blog Post

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.

4 Responses to “SIPphone's New Callback Service, Gizmo5”

  1. Om:
    I guess gizmo5 has lot more features to offer than jajah. Jajah is a pure voice calling service that provides easy interfaces like web and mobile to call different destinations, which includes international calling.
    Not sure why gizmo5 doesnt use sms signalling instead of data connection. Would be more reliable compared to data connection. Also, another thing not clear is why would they charge the user twice for calling any of their IM contacts. Considering one of the leg as IP, they should charge users only once.
    I have written some thoughts of mine about gizmo and other callback services in my blog.


  2. it requires a net connection to load it
    I think we need more options with no internet connection. Dial local number and get in.. Alot of folks are afraid to connect via cell$$$. Jajah has it right about hardware but missed it on software while MOBIVOX hit it ..
    a local number and youre talking…