Have you ever opened a text message or iMessage on iPhone, and then forgot to reply to it because it’s no longer marked as unread? Or perhaps you read a message and want to think about how to reply, and have a reminder to do so? Nearly all of us have had these situations, and that’s why being able to mark a message as unread is one of the handier new features available on iPhone.

With any iPhone running iOS 16 or newer, you can mark a message as unread, which maintains the notification badge both on the Messages icon and also the indicator next to the message…