How can I locate when the last time i used my phone when it's dead?

If your phone is dead, you can check your usage history through any linked accounts or services. For example, if you use an app like google Maps, you can look at your location history on the google Maps website. Additionally, if you have a backup service enabled, you might be able to find usage logs or backups on that platform. Finally, check your phone provider's account portal, as they often log call and message activity as well.