As you know we reported about a new bug in the core component of OS X and iOS and in this cause the device’s Messages app to crash and iPhone will be reboot.
Not iMessage alone, Snapchat and Twitter on iOS devices are also vulnerable to this iPhone crash text bug as they also use the CoreText component to display text on screen.
Here’s the steps How to Fix iPhone Crash Text Message Bug :-
1. Ask Siri to “read unread messages’
2. Use Siri to reply to the malicious message. After you reply, you”ll be able to open message again.
3. If the issue continues, tap and hold the malicious message, tap more, and delete the message from the thread.
Following these steps you would successfully access your message again. This procedure will provide only a temporary fix for the iPhone crash text bug.