Picture the movie version. An operator types a number, a satellite swivels, a crosshair drops onto a rooftop, and a voice says we have him. It is a wonderful scene. It is also, mechanically, nonsense, and untangling why is genuinely interesting.
First, navigation satellites do not swivel to look at anything. They broadcast time and orbit data to the entire hemisphere below them, indifferent to who is listening. There is no lens, no crosshair, no target. A GPS satellite finding your phone is like a radio tower finding your car stereo: it simply is not that kind of relationship.
Second, the position is computed in your phone, from signals it receives. For anyone else to know that position, your phone has to choose to share it, through an app, an operating-system feature, or an emergency service you have contacted. That sharing needs software on the device and, in almost every honest case, your permission. A phone number alone is not a magic key to any of it.
So how do phones ever get located by someone else? Through consented channels: find-my-phone features you switched on, family-sharing you opted into, or lawful requests to carriers who can approximate a handset from which towers it uses. All of these leave a trail, require access or authority, and stop cold at a stranger typing digits into a form.
Which brings us home. Live Sat Tracker is a prank. The orbital sweep is animation, the coordinates are theatre, and the number you enter never leaves your browser. We built it because the fantasy is fun and the reveal is funnier, and because the best way to defang a scary myth is to show its wires. See how the illusion is made, then go surprise a friend who will absolutely fall for it for about nine seconds.