Steel roof trusses, steel roof material, and racks and racks of steel shelving don't exactly make for an ideal radio signal environment. They aren't blocking si

Steel roof trusses, steel roof material, and racks and racks of steel shelving don't exactly make for an ideal radio signal environment. They aren't blocking signal, you are standing in an un-intentional Faraday cage. It likely has more to do with who your carrier is and what frequency your phone is connecting at. And FWIW, you don't have to be connected to a store's WiFi for them to track you - https://www.fastsensor.us/en/ https://www.fastsensor.us/en/ is only just one of the many companies who don't require your cooperation to track you in-store.