Have you recently updated your iPhone to iOS 26? The Liquid Glass effects creates a new and refreshing design to your phone navigation with translucent effects and glass-like behavior. But, such positivity in the overall interface is not the only noticeable effect of the new update. For some users, they encountered a glitch when sending text messages through their iMessage.
After installing the iOS 26 update, users received a Not Delivered notification in their iMessage. What may be the cause of this iMessage error? According to Apple, iMessage needs to be activated after setting up an eSIM or a new device with iOS 26.
Let’s try to understand the issue. When you have a new iPhone with iOS 26, you need to activate your eSIM. After activating it, you would have expected that everything is running smoothly, especially iMessage.
However, Apple said that this is not the case now. After activating your eSIM, you will also need to activate the iMessage manually. Otherwise, your messages will not be delivered or if delivered, only via an email address and not a phone number.
So, how to activate iMessage manually on your iPhone? Simply go to the Settings and open Apps. Select Messages and look for iMessage. To activate, just toggle the button off and then on again.
It may seem like a tedious thing to reactivate something that previously worked automatically. The good thing is that it only takes a few steps to do so.
