Mobile data not working after iOS 26 update on my iPhone 14 Plus

IOS 26 was a disaster for my iPhone 14. It is almost unusable. Need wifi to do anything and this is limited. I cannot make or receive calls even on wifi. Received a call from my medical provider and I was not able to answer the call. On navigation, I was only able to get directions if I had internet and while on the road it gave me bad directions and did not update me on traffic issues. I was not able to use bluetooth, 5G, or LTE. Seems to freeze up on anything I try. Message app is totally messed up. Even when I delete something it keeps showing up. Apple better fix this really fast, this is a dangerous situation.

I was able to fix this by deleting Nord VPN from my device.

Force Restart your iPhone (something I do after EVERY iOS update) and test again --> Force restart iPhone - Apple Support

If this doesn't help, remove any add on services, like VPN or anti-virus software.

If you don't have any add on tools you can remove and still no cellular data, contact your carrier as they are ones who provide that to your iPhone.

Same problem, iPhone 15 (MTM23LL/A / A2846), updated to iOS 26. Since then, I have no mobile data and cannot make calls. Curiously, I can receive calls. I cannot change or disable the SIM PIN, my number does not appear in Settings - Mobile Data, and the personal access point is disabled.

your phone have sim card or no? some LL set have dual sim card. if you have sim card open sim card tray and put your sim on the bottom don't put on top. it's work.. try if not try install using iTunes from PC clean install. If still than you need to downgrade back to iOS 18.6...

15 Pro Max. Same issue for more than a week now. Did all of the reset ESIM steps etc. Spent massive amounts of time and effort on this. Garbage update.

I have same issue and now I am stuck with perfect condition phone and everyone is asking me to upgrade.

even I had this issue had to reinstall the sim

I cannot get cellular service since updating my iPhone 14plus to iOS 26. Wi-Fi service is fine. My other phone from same carrier (not updated to iOS 26!) is normal/unchanged. I’ve done all the usual ‘fixes.’ Help!

your phone have sim card or no? some LL set have dual sim card. if you have sim card open sim card tray and put your sim on the bottom don't put on top. it's work.. try

but it's working perfectly fine on another device so i don't think its a carrier issue

Once you have installed iOS 26, it is not possible to downgrade to iOS 18.

even I am facing same issue in India. No solution worked. Worst update so far from Apple.

Thank you.

The back sim approach worked on my iPhone 14 promax. I couldn't make calls, send text messages or use my mobile data, but it works now.