Smart phones? My old dumb phone had GPS tracking. It took me a long time before I afforded to get a smart phone. Inject the illegal criminals with a dog tracing tag and be done with it.
ALL cellular devices that are on create a record of what towers they attach to. It’s how cellular networks function.
Smart, dumb, IoT, doesn’t matter. The carriers have the data natively. IT’s how the network operates - nothing sinister.