A Reddit user reported an abnormality that blocks an iPhone with a text message and force restart of iOS devices . The error occurs when one of your contacts sends you an iMessage to your iPhone. The text sent, however, has a certain particularity. This is a message that includes a specific string character and apparently in Arabic.
It seems to be operating even at Apple Watch and through post by Whatsapp.
لُلُصّبُلُلصّبُررً ॣ ॣh ॣ ॣ 冗