Android phones gather your location data and send it to Google, even if you’ve turned off location services and don’t have a SIM card, Quartz reported today.
The term “location services” oftentimes refers to exact GPS data for app usage, such as Google Maps finding your best commute route, or Uber figuring out exactly where you’re standing to let drivers know your pickup point. Quartz’s report details a practice in which Google was able to track user locations by triangulating which cell towers were currently servicing a specific device.
Since January, all kinds of Android phones and tablets have been collecting the addresses of nearby cellular towers and sending the encrypted data to Google’s push notifications and messaging management system when connected to the internet. It’s a practice that customers can’t opt out of — even if their phones are factory reset.
A Google spokesperson said in a statement to The Verge that all modern Android phones use a network sync system that requires mobile country codes and mobile network codes, so tower info called “Cell ID” codes were considered an “additional signal to further improve the speed and performance of message delivery.” Google ultimately discarded the cell tower data and didn’t go through with the original plan.
A source familiar with the matter stated that Google added the cell tower data-collecting feature to improve its Firebase Cloud Messaging, where devices have to ping the server at regular intervals in order to receive messages promptly.
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