In case of theft, you can track your mobile phone with the help of Google Device manager. This app must be installed on another cell phone. You can also erase all your data & bring the stolen mobile back to factory settings remotely from this app. For more info on settings etc. go to https://www.cnet.com/how-to/find-your-lost-android-device-with-android-device-manager/ For iPhone users, install Find My iPhone app on another device. Other precautions: Block your SIM, lodge a complaint at police station, get new SIM with the same number. In case you forget in auto, taxi contact their unions.