Cellphone alert system expected in 2 yrs Jerusalem Post The alert will take four forms: A cellphone vibration, audio alert, light flash, or text message. Currently, air raid sirens are programmed to identify and ... |
Cellphone alert system expected in 2 yrs Jerusalem Post The alert will take four forms: A cellphone vibration, audio alert, light flash, or text message. Currently, air raid sirens are programmed to identify and ... |
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