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

Popular Stories

maxresdefault

Apple Shows Off a Key Reason to Upgrade to the iPhone 17

Saturday February 7, 2026 9:26 am PST by
Apple today shared an ad that shows how the upgraded Center Stage front camera on the latest iPhones improves the process of taking a group selfie. "Watch how the new front facing camera on iPhone 17 Pro takes group selfies that automatically expand and rotate as more people come into frame," says Apple. While the ad is focused on the iPhone 17 Pro and iPhone 17 Pro Max, the regular iPhone...
wwdc sans text feature

Apple Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by
Apple plans to announce the iPhone 17e on Thursday, February 19, according to Macwelt, the German equivalent of Macworld. The report, citing industry sources, is available in English on Macworld. Apple announced the iPhone 16e on Wednesday, February 19 last year, so the iPhone 17e would be unveiled exactly one year later if this rumor is accurate. It is quite uncommon for Apple to unveil...
Apple Logo Zoomed

Tim Cook Teases Plans for Apple's Upcoming 50th Anniversary

Thursday February 5, 2026 12:54 pm PST by
Apple turns 50 this year, and its CEO Tim Cook has promised to celebrate the milestone. The big day falls on April 1, 2026. "I've been unusually reflective lately about Apple because we have been working on what do we do to mark this moment," Cook told employees today, according to Bloomberg's Mark Gurman. "When you really stop and pause and think about the last 50 years, it makes your heart ...
Finder Siri Feature

Why Apple's iOS 26.4 Siri Upgrade Will Be Bigger Than Originally Promised

Friday February 6, 2026 3:06 pm PST by
In the iOS 26.4 update that's coming this spring, Apple will introduce a new version of Siri that's going to overhaul how we interact with the personal assistant and what it's able to do. The iOS 26.4 version of Siri won't work like ChatGPT or Claude, but it will rely on large language models (LLMs) and has been updated from the ground up. Upgraded Architecture The next-generation...
iOS 26

iOS 26.3 and iOS 26.4 Will Add These New Features to Your iPhone

Tuesday February 3, 2026 7:47 am PST by
While the iOS 26.3 Release Candidate is now available ahead of a public release, the first iOS 26.4 beta is likely still at least a week away. Following beta testing, iOS 26.4 will likely be released to the general public in March or April. Below, we have recapped known or rumored iOS 26.3 and iOS 26.4 features so far. iOS 26.3 iPhone to Android Transfer Tool iOS 26.3 makes it easier...

Top Rated Comments

TJFDenver Avatar
19 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
19 weeks ago
so many bugs these days
Score: 14 Votes (Like | Disagree)
Biro Avatar
19 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
19 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
19 weeks ago
iOS 26 has bugs ?

I thought that Apple thoroughly test any new releases /S :).
Score: 8 Votes (Like | Disagree)
con2apple Avatar
19 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)