iOS 26 Cellular doesn't work after update

albin155 wrote:

Guys i may have found the solution for this problem , you need to turn lockdown mode off , you can check it via - privacy and security, lockdown mode

Lockdown mode is "designed for the very few individuals who, because of who they are or what they do, might be personally targeted by some of the most sophisticated digital threats. Most people are never targeted by attacks of this nature."

If you have it on and you don't fit into that category, you should definitely turn it off.

iPhone 14 Pro Max UK user here. I thought I had tried everything such as resetting network settings, restoring my phone, Airplane Mode, checking APN settings and everything short of praying to a higher power. My phone doesn’t have dual SIM. What worked was taking the SIM card out, restarting my phone, switching the Wi-Fi off when it came back on then reinserting the SIM. My network is GiffGaff which uses O2. Hope this helps others out, what a ridiculous problem to have following a major update!

Might have found a solution.

I went into Setting > Cellular > SIMs (eSIM for me) toggle that around. This will give the phone its nice little "cellular update"

Hope this helps!

I had the exact same problems, did everything people recommended, nothing worked…until I flipped the sim to the other side of the tray and problem solved! I’ve got an iPhone 14

After updating my iPhone 14 to iOS 26, it started showing SIM Failure. Apple support and service diagnostic tools indicate hard ware failure and I need to replace mother board. I don't think it is a coincident. And Apple support says it could be a pre existing problem and got revealed in iOS 26. Now there is no way to go back to older version and prove that it works in iOS 18. Hoping that Apple provides a patch soon to address this issue.

I flipped the sim from the top to the bottom of the sim tray and it worked. Got this from Reddit

After flipping my sim to the other side of the tray, it worked for me, my model is 14 pro max

Having the same issue. I brought my phone to a local phone repair shop and they reverted it back to ios18 and the cellular works fine again now. Definitely something up with iphone14s and the latest update. It happened when I did the beta update a couple weeks back and the. Happened again today when i did the public ios26 update. Back to the phone shop I go again.

I had the same problem but I fixed it by switching the Roaming data on and service (4G) sign appeared immediately after going days without having service.

MNtoBdx23 wrote:

I had the exact same problems, did everything people recommended, nothing worked…until I flipped the sim to the other side of the tray and problem solved! I’ve got an iPhone 14

You must have a chinese market phone?

Resetting network settings fixes this

Downgrading back to iOS 18 worked for me, I’m having the same issue on my 14 pro max and from what I’ve read online I’m not the only one. I don’t think it’s a hardware issue, if it is hardware it affects a lot of 14 pro and pro max users which is dumb

What finally worked for me was signing out of my Apple ID, rebooting the phone (did a full reset which is annoying but worked), then signing into WiFi and inputting my Apple ID. Finally back online.

i didt know before that my iphone 14 pro can support 2 sim card. It solve my cellular network issue after i put my simcard at the other side. Hope all can try

Guys i may have found the solution for this problem , you need to turn lockdown mode off , you can check it via - privacy and security, lockdown mode