No Cellular Service After iOS 26.0.1 Update

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If your call fails or you can’t receive calls on your iPhone - Apple Support

~Katana-San~

CupertinoWave wrote:

1. Hello,

I updated my iPhone 12 Pro Max to iOS 26.0.1 yesterday, and since then my cellular service has stopped working.

I had no issues on iOS 26. I’m using a T-Mobile eSIM.

So far I’ve tried the following troubleshooting steps without success:

Restarted the phone

2. Toggled Airplane Mode on/off

3. Toggled Lockdown Mode on/off

4. Reset Network Settings

Despite this, I still cannot make or receive calls, send texts, or use mobile data.

Has anyone else experienced this issue or found a solution?

what did T-mobile say?

Same here. For both me and my wife’s phones. iPhone 17 pro. ios 26.0.1. Contacted T Mobile, we went through all the same steps. Nothing. They’re going to escalate. It’s very frustrating