Wave Driver is a cell phone locator service activated by sending a simple message from a different phone. Install this app on your Android cell phone and let your family / friends / students know. If you have the app turned 'ON', they can text 'gml' (all lower case) to your phone to get your location.
For Forwarding Chart:
Forwarding charts can be used to let people know that they should text another number to get the proper location of an object. To set the forwarding number, you need to create a Google Sheets document. Then, you need to enable link sharing. Allowing people that have the link to view it will work. Then, you can paste the URL of that Sheets file into the Wave Driver app in Settings And Help. Click save, and you are ready to go! The format of the forwarding Sheet should look similar to: https://docs.google.com/spreadsheets/d/16T7J94Wi6Dn90ohyTCv6C215K-3Ag5ExWvXrRXau4uU/edit?usp=sharing . You are ready to go!