iOS 26 Cellular doesn't work after update

Ktuyn wrote:

Mạng di động iOS 26 không hoạt động sau khi cập nhật

cập nhật lên iOS 26.0.1

I also have the iPhone 14 Pro Max and after Tuesday’s installation, nothing works was on the phone with Verizon and then Apple for almost 3 hours on Wednesday and still have no issue after doing tons of resets, including the SIM and network settings. Try to follow the suggestion here, but I don’t have any duplicate eSIM‘s to move up and down wondering if anyone else has found a solution since I still cannot make any calls get any text messages view emails or check my calendar.

Rowleysghost wrote:

Try flipping your sim to the other side of the tray, it worked for me

That only works on twin SIM tray phones intended for the Chinese market, all other iphones only have one tray location. Simply removing and replacing the SIM while the phone is turned ON has the same effect

Salmanali9 wrote:

Make sure whether Lockdown mode is enabled or not

NOBODY should enable lockdown mode unless under severe attack and just before contacting Law Enforcement. It is not a routine setting

I am facing the exact same problem on my iPhone 16 pro max. After updating to iOS 26 I realized I couldn’t make any call nor access my cellular data. After a day of continuous trying I simply let my sim out of the tray and waited a full day.

I could now use my cellular data but I couldn’t still make calls. I struggled with it for more than a day now hoping Apple gets this fixed but after my phone died down, I plugged it on charge and realized it’s back to how it was where even the cellular data doesn’t work anymore.

I retried the same method I used several times but to no luck.

I’m going through the same thing on my iPhone 15 pro. The weird thing was that the cellular issue didn’t happen right away, it happened about a day to day and a half later. Apple support via chat couldn’t fix it and said I have to go to the Genius Bar and they don’t have an available appointment until Tuesday evening! So I can’t make or receive calls for 4 days, that’s insane!

I have a similar issue, but it happens during the night while I'm charging the phone.

I updated the phone using my Mac, and restored my local save. After restoring, it didn't ask me for the physical SIM PIN code either.

I did the update on the 16th of September and since then, every morning, I have to type in my physical SIM PIN to activate cellular functions. I tried the different method described here to trigger a cellular update but I was never prompted to do one...

I did the diagnostic tool that didn't show any malfunction.

If you are using a refurbished or a phone purchased from a 3rd party seller - It is most likely not a hardware failiure as it is detecting the difference in your Sim slots (aka if you have a model made for US with esim only but your phone has a sim slot) but the issue IS from ios 26 still as it was not present there

First thing is to switch off your phone, second is to eject your sim with a sharp pin or the ejection tool that comes with the iPhone when you first purchased it. Third thing is to Swap your sim. Now here is the tricky part. There are two sim compartments on the sim tray, one at the top and the other is at the bottom (you have got to look well). The top tray faces your sim chip to the top, the bottom tray faces your sim chip to the bottom. Use the opposite tray of your current sim - so if your sim chip is facing the top, swap it to the bottom, if it is facing the bottom, swap it to the top (you have to make sure it fits). After that make sure the sim tray fits when you insert it back to its space. Next is to turn on your iPhone and switch off your WiFi for the sim to be detected. Hope this works for you. All the best!!! Mine is an iPhone 14 Pro Max.

I am also facing the same issue. I have iPhone 15 Pro Max. I tried to take the sim out and restart the phone without turning the wifi on, then I inserted the sim back. Now I can use the data and get receive incoming calls but am still not able to make outgoing calls.

Additionally, I cannot add my phone number in my cellular settings and am trying navel to turn on the hotspot.

I’ve tried restoring my phone, turning Airplane mode on and off, taking out and reinserting the sim in the other slot, checking carrier updates and what not.

Can someone please help me as soon as possible?

Here is the solution: Follow the instructions below — it is 100% effective.

1. Check your iPhone for compatibility by verifying if you have two IMEI numbers.

2. Open the dial pad and dial *#06# This will display your IMEI numbers. If you see two, that's ideal.

3. Alternatively, go to Settings > About to view the Back SIM information. If this information is available, it's a good sign.

Next, proceed with the SIM card adjustment:

4. Eject the tray and remove the SIM card.

5. Inspect the back of the tray to see if there is space available (remember, check the back of the tray). In most cases, there may not be enough room.

6. If needed, carefully cut your regular SIM card on each side by approximately 1mm to ensure it fits into the tray. It's recommended to test this on a spare SIM first.

Finally:

7. Insert the modified SIM onto the back of the tray (not the regular side).

8. Power on your device, and it should work perfectly.

Feel free to ask if you need further assistance!

I tried to go back to 26.0 using a backup, but you can't do that without activating the phone and I have no cell service to activate and my phone is stuck as if it was a new phone but has no cell service. So I'm at the AT&T store trying to fix this. What a SNAFU.

This is the seventh day without access to cellular data on my iPhone 14 Pro Max. I have followed all recommended troubleshooting steps found in various discussion threads, but the issue persists. My service provider is Xfinity Mobile; however, their support team was also unable to resolve the problem. The recent update (version 26.0.1) did not address this issue. The next step is probably to contact the Apple Store support team and schedule an

appointment, though their hours are limited to mornings. Apple, please fix this thing now!

mommaBusterdude wrote:

Apple - Is there another bug fix coming for the folks that took 26.0.1 and it didn’t fix their cell service issue?

Apple is not here in this user-to-user forum. If you want to speak to them directly, try the Support link at the bottom left of every page of this forum. However, they are unlikely to give you the information you seek. Apple doesn't announce incremental updates ahead of time.

You can also submit feedback to Apple here:

Product Feedback - Apple

IOS 26.0.1. IPhone 15 Pro Max. All Sims on my device stopped working today. I tried everything I could find on the Internet to fix the problem. Forced reboot, airplane mode, network reset, eSim removal, eSim reinstallation, even tried to put a physical Sim, but the phone does not see the network. I saw it in the morning, and stopped seeing it at lunchtime. And by the way, the old Sim phone does not delete, the inscription "remove SIM", but nothing happens. To be honest, I'm just furious