What's the deal with the "Geo-Fence?"

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how work? caught of in keynote not entire thing. i'm looking details. in advance!
 

the iphone (4 , above) has special hardware on cellular modem can detect when leaving or entering "region" on map usual semi-frequent pings , different cell towers. means gps doesn't have turned on, not lot of battery drain.

when enter or leave region define, can have phone remind of something. feature has been available developers implement in own apps since ios 4.0.
 


Forums iPhone, iPad, and iPod Touch iPhone iPhone


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