When you power up a mobile/cell phone, the handset transmits a handshake to all mobile/cell bases it can hit. Handshaking between mobile/cell phone and mobile/

When you power up a mobile/cell phone, the handset transmits a handshake to all mobile/cell bases it can hit. Handshaking between mobile/cell phone and mobile/cell bases continues somewhere between every 10 to 20 minutes. Data exchanged include; IMEI [1], IMSI [2], and both handset transmit power level, receiver power level to each mobile/cell bases databases. Coupling both the mobile/cell bases databases and the locations topographical data allows RDF [3]. So even if you have location data turned off, you can still be tracked. [1] International Mobile Equipment Identity (IMEI) : https://en.m.wikipedia.org/wiki/IMEI https://en.m.wikipedia.org/wiki/IMEI [2] International Mobile Subscriber Identity (IMSI) : https://en.m.wikipedia.org/wiki/International_mobile_subscriber_identity https://en.m.wikipedia.org/wiki/International_mobile_subscri... [3] Direction Finding (DF) (aka) Radio Direction Finding (RDF) : https://en.m.wikipedia.org/wiki/Radio_direction_finder https://en.m.wikipedia.org/wiki/Radio_direction_finder