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

iphone air thickness

Apple Said to Cut iPhone Air Production Amid Underwhelming Sales

Friday October 17, 2025 8:29 am PDT by
Apple plans to cut production of the iPhone Air amid underwhelming sales performance, Japan's Mizuho Securities believes (via The Elec). The Japanese investment banking and securities firm claims that the iPhone 17 Pro and iPhone 17 Pro Max are seeing higher sales than their predecessors during the same period last year, while the standard iPhone 17 is a major success, performing...
iOS 26 Feature

iOS 26.1 to iOS 26.4 Will Add These New Features to Your iPhone

Saturday October 18, 2025 11:00 am PDT by
iOS 26 was released last month, but the software train never stops, and iOS 26.1 beta testing is already underway. So far, iOS 26.1 makes both Apple Intelligence and Live Translation on compatible AirPods available in additional languages, and it includes some other minor changes across the Apple Music, Calendar, Photos, Clock, and Safari apps. More features and changes will follow in future ...
iOS 26

iOS 26.0.2 Update for iPhones Coming Soon

Friday October 17, 2025 7:35 am PDT by
Apple's software engineers continue to internally test iOS 26.0.2, according to MacRumors logs, which have been a reliable indicator of upcoming iOS versions. iOS 26.0.2 will be a minor update that addresses bugs and/or security vulnerabilities, but we do not know any specific details yet. The update will likely be released by the end of next week. Last month, Apple released iOS 26.0.1,...
HomePod mini and Apple TV

Apple's Next Rumored Products: New HomePod Mini, Apple TV, and More

Thursday October 16, 2025 9:13 am PDT by
Apple on Wednesday updated the 14-inch MacBook Pro, iPad Pro, and Vision Pro with its next-generation M5 chip, but previous rumors have indicated that the company still plans to announce at least a few additional products before the end of the year. The following Apple products have at one point been rumored to be updated in 2025, although it is unclear if the timeframe for any of them has...
14 inch MacBook Pro Keyboard

New 14-Inch MacBook Pro Has Two Key Upgrades Beyond the M5 Chip

Thursday October 16, 2025 8:31 am PDT by
Apple on Wednesday updated the 14-inch MacBook Pro base model with an M5 chip, and there are two key storage-related upgrades beyond that chip bump. First, Apple says the new 14-inch MacBook Pro offers up to 2× faster SSD performance than the equivalent previous-generation model, so read and write speeds should get a significant boost. Apple says it is using "the latest storage technology," ...
iPhone Siri Glow

Some Apple Employees Have 'Concerns' About iOS 26.4's Revamped Siri

Sunday October 19, 2025 7:39 am PDT by
iOS 26.4 is expected to introduce a revamped version of Siri powered by Apple Intelligence, but not everyone is satisfied with how well it works. In his Power On newsletter today, Bloomberg's Mark Gurman said some of Apple's software engineers have "concerns" about the overhauled Siri's performance. However, he did not provide any specific details about the shortcomings. iOS 26.4 will...
Apple iPad Pro hero M5

New iPad Pro Has Six Key Upgrades Beyond M5 Chip

Saturday October 18, 2025 10:57 am PDT by
While the new iPad Pro's headline feature is the M5 chip, the device has some other changes, including N1 and C1X chips, faster storage speeds, and more. With the M5 chip, the new iPad Pro has up to a 20% faster CPU and up to a 40% faster GPU compared to the previous model with the M4 chip, according to Geekbench 6 results. Keep in mind that 256GB and 512GB configurations have a 9-core CPU,...
m4 macbook air blue

M5 MacBook Air Coming Spring 2026 With M5 Mac Studio and Mac Mini in Development

Thursday October 16, 2025 3:57 pm PDT by
Apple plans to launch MacBook Air models equipped with the new M5 chip in spring 2026, according to Bloomberg's Mark Gurman. Apple is also working on M5 Pro and M5 Max MacBook Pro models that will come early in the year. Neither the MacBook Pro models nor the MacBook Air models are expected to get design changes, with Apple focusing on simple chip upgrades. In the case of the MacBook Pro, a m...
14 inch MacBook Pro Keyboard

M5 Chip Achieves Impressive Feat in 14-Inch MacBook Pro Speed Test

Friday October 17, 2025 7:10 am PDT by
The first alleged benchmark result for the M5 chip in the new 14-inch MacBook Pro has surfaced, allowing for some performance comparisons. Based on a single unconfirmed result uploaded to the Geekbench 6 database today, the M5 chip has pulled off an impressive feat. Specifically, the chip achieved a score of 4,263 for single-core CPU performance, which is the highest single-core score that...

Top Rated Comments

TJFDenver Avatar
3 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
3 weeks ago
so many bugs these days
Score: 14 Votes (Like | Disagree)
Biro Avatar
3 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
3 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
3 weeks ago
iOS 26 has bugs ?

I thought that Apple thoroughly test any new releases /S :).
Score: 8 Votes (Like | Disagree)
con2apple Avatar
3 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)