iOS 26 Cellular doesn't work after update

This is my second message in this forum. Will Apple be releasing a fix soon? I've been stuck without a functioning phone for almost a month and a half now, and it’s extremely frustrating. After using Apple for nearly 15 years, I’m seriously considering switching to Android.

I’m an iPhone 15 Pro Max user in Ireland. I’ve tried everything — resetting network settings, restoring the phone, toggling Airplane Mode, checking APN settings, and more. My phone uses dual eSIM, and even after updating to iOS 26.0.1, I still have no network. It’s been more than a month with no service at all.

Does anyone know when Apple plans to release a fix for this issue?

I’ve been having the same problem ever since updating to iOS 26.1 on my iPhone 12 Pro Max.

I went to the Genius Bar, and the initial diagnostics showed that cellular, Wi-Fi, and Bluetooth were all not working. They then restored my phone, and everything passed the diagnostic tests afterward.

However, once I got home and inserted my SIM card, everything stopped working again. It’s clearly a software issue, but the only advice they gave me was to trade in the phone…

It’s really frustrating.

I've had this problem since updating from iOS 18 to 26, albeit intermittently. My 13 Pro has no problems with cellular data when I remain within my country, but as soon as I cross the border it loses the signal, and it can take a while to get it back. Turning on Airport mode does not help to find the new carrier when turned back on, and sometime under network selection nothing happens, and occasionally there is no tab for network selection but just shows my cellphone number. We're now on iOS 26.4 and the problem does not seem to have been resolved. My carrier operator gave me a new SIM card, but that has not solved the issue. It's a right pain. If you take it in to Apple they will say it's a hardware problem with your phone and might try to charge you an exorbitant repair fee. But given the very high number of users that experienced the problem following the upgrade to iOS 26, it is clearly a software issues caused by Apple - at least according to more tech savvy people than me. Good luck.

If you have a phone with dual physical SIM slots, try moving the SIM to the other slot:

Call failed on iPhone 14 Pro Max after iO… - Apple Community

I noticed it on first public beta and reported it. Surprised they never fixed it...

Did you buy a dual sim tray and try inserting your sim on the other side?

Facing the same issue. I cannot make calls and cannot connect to mobile data ever since I did the update. Apple support says I have a problem with my hardware and should contact the nearest service center. However, I don’t consider this because this problem only started after the update!! So apple should release a patch asap to fix this!

I’m facing the exact same issue. Ever since I installed the update, I can’t make calls or use mobile data at all. Apple Support just says it’s a hardware issue and tells me to go to a service center, but that makes no sense — this only started right after the update!

[Edited by Moderator]

Same here i was using 2 sim one was phyisical sim and 2nd was esim but today after update my phone just lost the settings for esim and the 2nd sim just got removed now I can’t add it again

[Edited by Moderator]

Same thing happened to me too with iPhone 14. Now there is no cellular so can’t make any calls or send any messages. Apple diagnostics said it was a hardware problem but I didn’t have a single problem before the update. It worked perfectly. I’ve tired every solution multiple times. How will this be fixed? And how long will it take? It’s essential to be able to use cellular.

I am surprised this issue hasn’t been fixed yet. Just today, I saw there’s an update to ios26 and naturally, I did the update only to be confronted with this same issue of loss of sim. I truly didn’t expect this and it is such grave inconvenience for me. Hope apple fixes this problem immediately please.

i updated to iOS 26 last night right after my phone is not getting any internet connection and Wi-Fi internet connection as fast internet wifi does not receive any internet connection when I hotspot to my iPad from my phone internet, my iPad gets internet from my phone, but my phone does not get any internet connection after ios 26 update

Yes…

It’s frustrating. My iPhone 16 pro max was working just fine but when I updated from iOS 18 to 26 and I’ve not been able to make calls, it keeps saying called failed.

I’ve restarted, I’ve reset network settings yet I can’t make calls.

Nothing literally works and I’m getting frustrated been 5 days my mother has health issues so she can’t really call me unless I have wifi and I’m getting worried when I leave the house cause what if something happens to her Apple needs to fix their update before someone gets hurt and they can’t call for help cause it will be in their hands

Not only has my iPhone had several problems since the iOS 26 update, but when I got on a support chat forum from VERIZON they referred me to a “tech pro” and a pop up window appeared that requested my credit info. The tech assured me that I would only be charge $1 and that would be refunded if the problem wasn’t solved. Well the problem was NOT solved and I was charged $46. Needless to say I’m very upset. My iPhone 15 doesn’t work so I cannot call my Bank or Verizon. I’m currently using my iPad to covey this message. PLEASE HELP. I’m 77 and house bound. So driving to the Apple Store several miles away in traffic is impossible. Apple has to do better. @Apple.com