Apple Provides Fix for iMessage Activation Bug in iOS 26

Apple this week provided troubleshooting steps for iPhone owners who are unable to activate iMessage with a phone number in iOS 26.

iOS 26 Messages Feature 2 1
According to Apple, some customers might not be able to activate iMessage with a phone number if there is an inactive SIM or eSIM with the same phone number as an active SIM on the ‌iPhone‌.

Customers who are experiencing this problem will see a "Not Delivered" alert for sent iMessages, and iMessages won't be able to be received. Messages will be sent and received via RCS or SMS, and will have green bubbles instead of blue bubbles. Alternatively, iMessages might be sent using an email address instead of a phone number.

To get iMessage to work in that situation, users should remove the inactive SIM and attempt to reactivate iMessage. Deleting a SIM that's not in use can be done by going to the Cellular section of the Settings app, and deleting the inactive SIM if there are two displayed with the same phone number.

If the inactive SIM is a physical SIM, it should be removed from the ‌iPhone‌. If the inactive SIM is an eSIM, it can be deleted from the Cellular interface. After the inactive SIM has been removed, iMessage can be activated by going to Messages, tapping on Send and Receive, and tapping on the displayed phone number.

Related Roundups: iOS 26, iPadOS 26
Related Forum: iOS 26

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Top Rated Comments

TJFDenver Avatar
2 weeks ago

I’m still on 18.7.1… apparently with good reason. Nothing that iOS 26 offers is on my list of desired features. So it’s not worth the trouble for me.
Bro, upgrade to 26 and join the rest of us dumbasses
Score: 15 Votes (Like | Disagree)
psxp Avatar
2 weeks ago
so many bugs these days
Score: 14 Votes (Like | Disagree)
Biro Avatar
2 weeks ago
I’m still on 18.7.1… apparently with good reason. Nothing that iOS 26 offers is on my list of desired features. So it’s not worth the trouble for me.
Score: 9 Votes (Like | Disagree)
Lizzard899 Avatar
2 weeks ago
Sounds like too much work just fix it with another ios update. 26.0.2 perhaps.
Score: 8 Votes (Like | Disagree)
Plutonius Avatar
2 weeks ago
iOS 26 has bugs ?

I thought that Apple thoroughly test any new releases /S :).
Score: 8 Votes (Like | Disagree)
con2apple Avatar
2 weeks ago
I wrote comments saying it would be better to wait until iOS 26.2 in February. That way, Apple can first iron out all the bugs that they had to ignore due to the overly short “beta phase”.
I think I got over 50 thumbs down from the “community” and half a dozen comments saying I am a hater.

...
iOS 26 was released with WiFi and Bluetooth issues. iOS 26.01 still has problems with iMessage.
And who knows how many serious bugs there are that the major media outlets would rather not make headlines. Worldview, fan service... you know.
Score: 5 Votes (Like | Disagree)