Push-to-talk and SOS when cellular networks fail.
First responders, including the armed forces: push-to-talk voice and data, phone to phone, on compatible phones running Vizible Zone.
TodayA person in distress or trapped: SOS, and a voice and data channel to the rescuers.
TodayUtilities and field crews: push-to-talk and messages where there is no network.
VisionAn alert, an SOS and messages will cross a whole city, from phone to phone.
A communications fallback: D2D using Direct Mode Operation (DMO). It complements existing radios and networks.
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