It's even more sophisticated than that now. Small Apple "air tags" can be slipped into almost everywhere...cars, purses, pockets, etc. and be used to track someone just about anywhere.
>>...However, alarming reports of the device being used for stalking, theft, kidnapping attempts, and other criminal purposes have come to light. A number of individuals, mostly women, have shared frightening accounts of discovering unknown AirTags in their cars and coat pockets.
On Thursday, January 6, model Brooks Nader took to her Instagram Story to detail
her terrifying experience of being targeted. While walking home alone from a restaurant in New York City’s Tribeca neighborhood shortly before midnight, she received a notification on her phone that someone was tracking her and had been for “a while.”
Brooks realized that a stranger had slipped an AirTag in her coat pocket, which was resting on the chair behind her while she sat inside the crowded establishment....<<