There are many. One example would be traveling through or staying in regions with high surveillance: In areas known for extensive government or third-party surveillance, turning off your phone can prevent tracking and data collection. Another example would be protests or political gatherings: These events often have increased monitoring by authorities, and turning off your phone can help protect your identity and location.
 

 Thanks for that, I don't see this information anywhere else other than Nostr. 

 You bet :)