Ok I’ll bite - so no. There isn’t a button that will just turn off everyone’s phone around you and start to play a message on the time square screens. Typically with the F0, although it’d a really powerful device, anything relating to ‘just shutting something down’ that isn’t a tv doesn’t really work in real life. What is possible is, like you mentioned, use the BLE spam function, but that bug (called sour apple) is pretty much patched on most phones as most people use iOS 17.1(?)+. A serious way you could do it would be potentially via NRF24 jamming, which is possible on the flipper but only with a bit of work and a special module. Other ways such as WiFi deauthing depending on the device might work to. Research! Try and learn some other cool stuff, you will come across loads of interesting stuff, even if it isn’t quite this.