iOS Bug Crashes iPhones Simply by Receiving a Text Message
A new bug has been discovered in the Messages app, allowing a string of characters sent to a person via iMessage or SMS to crash an iPhone and cause the Messages app to crash after being opened. The bug, which requires a specific string of symbols and Arabic characters to be sent, was first noticed on reddit earlier this afternoon and has been spreading around the Internet since then.
Sending the string of characters to an iPhone results in an immediate respring, causing an iPhone to crash and quickly reboot. From there, if the Messages app was opened at a list view, the Messages app crashes automatically when you try to open it. If it was opened to the conversation where you received the message, the app will open, but attempting to go to another conversation causes Messages to crash.
MacRumors tested the bug on iPhones running iOS 8.3, but it may also be affecting other versions of iOS.
If you receive one of these messages, there are a few possible fixes that have worked for us and for other people who have encountered the bug. If the Messages app was opened to the conversation with the person who sent the offending message, the Messages app can be reopened to this conversation. Sending a reply message fixes the problem.
If Messages was opened to the conversation list view, the app will crash when you attempt to open it. You can fix this by having someone send you a message or by sending a message to yourself. There are several options for sending a message to yourself, including sending yourself a message via Siri or through the Share sheet in any app.