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by JetSpiegel
2693 days ago
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A cell tower receives a request from a particular phone in range and sends the nearest GPS sattelites for the phone to try first, cutting down the first GPS fix to seconds.
The carrier has a list of IMEI that requested AGPS data for each tower, it's only metadata, the phone doesn't get the data. This is my understanding, I'm not entirely sure about the first part. |
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