That's one of the predictions that many sci fi productions of yesteryear got wrong.
They all had that tracking device scene where the guy was strapped to the table, and some robotic arm came down and inserted the tracking chip into his belly button, or behind his eye, or onto his spine.
Nope. Make it a phone and a camera, and give it internet access. The masses will stand in line for hours, hoping to get the latest version of their tracking device.