'almost forgot to mention:
Where you can find more info on Zello:
It's free & runs on Android / Apple devices
& PC's running Windows 7 or 8.x
Zello's audio quality is terrific!
PS I -don't- work at Zello.com, etc.
. I just like their product / service.
thanks for the tip. Loaded it onto three iphones a Blackberry and a HTC today, started a work network.