There are legions of Bluetooth item trackers that can help you find your keys or your bag. However, there's a common problem: without always-on data, you might not find them unless someone with a tracking app happens to wander nearby. Samsung might have a better approach. It's launching a SmartThings Tracker that uses low-power LTE-M data to share its location where Bluetooth and other technologies won't have the range. You could track your backpack even if if you only remembered it when you got home.