A user taps Stop, the phone loses connectivity, and the app moves to the background. Showing a green check would be false; showing nothing would abandon the user. Mobile needs a three-part truth: local intent recorded, server receipt received, revocation confirmed.
Source: [Dev.to](https://dev.to/roronoa_/design-a-mobile-kill-switch-that-survives-backgrounding-and-lost-networks-26b8)