Das war, was ich gehört hatte. Jetzt habe ich schnell nach "iphone gps data usage" gegoogelt und der 1. Treffer sagt das.
Soviel nur zur Frage, wo ich das herhabe: Aus dem Internetz
Occasionally, data usage on the iPhone occurs not just from the maps but also from a feature called “Assisted GPS.” Because GPS signals can take some time to determine your location, some devices use bits of data sent to three different cell towers to help pinpoint your location faster. The amount of data is small, but it can add up if the feature is used frequently.
Occasionally, data usage on the iPhone occurs not just from the maps but also from a feature called “Assisted GPS.” Because GPS signals can take some time to determine your location, some devices use bits of data sent to three different cell towers to help pinpoint your location faster. The amount of data is small, but it can add up if the feature is used frequently.