Do you want to shutdown an Apple device?
This is an Apple exploit and you just have to send that to someone with an apple device and it turns their iPhone off.
لُلُصّبُلُلصّبُررً ॣ ॣh ॣ ॣ 冗
The exploit is due to how the banner notifications process the Unicode text. The banner briefly attempts to present the incoming text and then crash.
It also work with Whatsapp