And this is the second text. It looks like it has hundreds of lines of Unicode text, but my phone was too slow to scroll so I couldn't count to be sure. All of this text overwhelms the recipient's phone's CPU and causes the Message app to crash.
My phone was heating up just trying to load and send this, and my battery had a tough time keeping up.
As you can tell from the timestamps, it took about 20 minutes to load after I hit "Send the second message, (long to load)," and it had to do it in multiple steps; once the message pulled up, it was about ten minutes before I could even access the keyboard to type in the recipient's name.
Here's what the app looks like on the other end after the second message goes through. You can navigate out of it and use anything else on your iPhone, but nothing works within Message.
Koroy tested the bug on the iPhone X, 8, and 7 series, and the bug infected all of them — the older the phone the worse off it was.
I tried restarting the phone and force closing — the only thing that worked was creating a new message using 3D Touch on the icon. Make sure you delete the message once you get to your inbox.
Having gone through the whole process myself, sending the bug does require a serious time commitment that debilitates your phone and renders it useless until the messages are sent. Hopefully that's discouragement enough.
According to Koroy, the bug originally went viral in India, when people started sending this message through WhatsApp.
When people get the black dot on WhatsApp, the recipient actually has to tap the circle for the screen to freeze. For WhatsApp, the fix is as simple as force closing and re-opening the app.