Replies to post #58098 on Calypso Wireless (fka CLYW)

[Visnusahasranama]

BlackBerry MVS is designed to transition calls automatically
between Wi-Fi and wireless networks depending on coverage
and signal strength, so calls placed on one network continue
seamlessly when coming into or out of range of another. When
a call is being transitioned between networks, the user will
hear and see a notification of the change, enabling a better
awareness of mobile airtime usage.

http://us.blackberry.com/business/software/blackberry-mobile-voice-system.html

I smell more infringers.