This latest bug involves sending a text string containing the black dot emoji to the victim (don't do it, don't be that person).
The first thing that you have to do is force close the iMessage app and then ask Siri to send a reply to the sender of that message.
Apple has yet to issue a fix for the bug. According to YouTube channel EverythingApplePro it's called the "black dot" because of its origins on Android as a bug relating to WhatsApp that was spread with the same emoji, initially in India.
When you head over to the search screen looking for a message, there will be three options as mentioned above and when you choose them, your message will be searched only in the particular category, making it easier to find.
The bug affects iPhones and iPads running iOS 11.3 and the beta releases of iOS 11.4. Tapping on Search will open a Filter list which will allow you to apply filters like unread chats, broadcasts messages, or groups.More news: Zinedine Zidane 'not getting into' Neymar links to Real Madrid
'... If you didn't know what was going on, you'd definitely think the Messages app was broken permanently'.
If you don't have 3D Touch, the steps are slightly different.
Tap on Edit and then tap on the circle to the left of the conversation that contains the message. Users need to force-quit the Messages app on their devices and then open a New Message screen through a quick action by long-pressing the Messages app. Users will then be able to delete the conversation thread including the black dot message. Apple is typically fast in responding and fixing bugs, so you should expect the company to come out with a fix for the black dot bug soon enough. Clicking on the black dot causes the crash to occur.
Its understood that the text message is being circulated by friends as a prank to their WhatsApp contacts, to deliberately crash their phones.