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A comment on IPhone 4S has GLONASS in addition to GPS. Parent comment

Re:IPhone 4S has GLONASS in addition to GPS by fleitz on Wednesday October 19, 2011 @01:59PM (#3131261)
Cell towers kind of do by providing an accurate time and other features in AGPS.
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Re:IPhone 4S has GLONASS in addition to GPS by modeless on Wednesday October 19, 2011 @04:04PM (#3131809)
Not really. AGPS improves the time it takes to lock on to the GPS signal, but it doesn't improve accuracy.
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