See smart tags
Samsung's Bluetooth trackers introduced in 2021. SmartTags use Samsung's SmartThings Find app built into Galaxy phones. There are two SmartTag versions. One for Bluetooth Low Energy (BLE), which all Galaxy phones support, and SmartTag+ for Ultra-Wideband (UWB) on newer phones. SmartTag+ can pinpoint a tag's location within inches. See Bluetooth tracker
The vehicle toll collection system in Malaysia.