Ever think about how much information google has collected about you? Apart from services there are additional things going on that you might not be aware of Table of Contents Data Collection Location Services Services Photos Phone Sensors Degoogle Resources Data Collection Data collected is often uploaded to google servers IMEI, hardware serial number, Wifi MAC address AndroidID, Google Ad ID [1] https://www.scss.tcd.ie/Doug.Leith/Android_privacy_report.pdf Location Services In addition to GPS tracking, there is a service that runs on android phones and looks at available wifi networks to determine your location.