iOS 26 Cellular doesn't work after update

all update

Yes! I’m freaking out. What do we do?,

All these solutions here do not work with t mobile.

Then it’s certainly possible it’s a t-Mobile issue. Five months of updates, workarounds and setting errors resolved. Certainly could be a hardware issue or carrier issue.

Updated my iPhone 11 to the latest update and the network is extremely slow.

watching a video or photo online is a challenge. coming online alone is now boring. Please let it be fixed

iPhone 13 didn’t make call or receive calls after updating to ios 26.0.1 what will be the problem

The worst ever iOS 26. Since I installed constantly loosing signal and no sim card issues. My is up to date (17.06.2026) and is getting only worse!!!! Have to reboot the phone every 10 minutes.

iOS 26

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!

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.

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 user here, my cellular network wasn't working for an entire week after the update. I've tried resetting, turning on Airplane Mode, flipping my sim-card to the bottom of the tray, backing up and restoring to the previous IOS 18.7 version, but nothing worked. But, I found a method that solves the issue for me. All I did was:-

-Go to "Settings" and go to "Mobile Service" or "Cellular"

-Turn Roaming On and Off (or back on again)

-Then go to "Voice and Data" and select "4G only"

And my issue was solved. Turns out IOS 26 has issues connecting the iPhone 14 series to 5G networks, so it's better to stick to 4G for now until they resolve this issue in the upcoming IOS 26.1 update. Hopefully, this helps you guys. If it doesn't, just wait until the next patch.

iOS 26.0.1 has been released which is claimed to address

- A small number of iPhone users may be unable to connect to a cellular network after updating to iOS 26

So hopefully it will address this for most users which did not get their hardware damaged.

IdrisSeabright

Is right, my brother's iPhone 11, after updating to iOS 26.0.1, didn't make or receive calls, until he checked the lockdown was already turned on, he turned it off, and the phone worked normally again after it restarted.

Thank you for your support

The easy fix for our company devices - Remove MS Defender app. devices all came back online and started working. Defender reinstalled itself (due to our policy on the devices) and devices still working.

This was done on an iPhone 11, 14, 15 and several different flavors of iPads old and new.

All began working once Defender was removed.