Cannot connect to my cellular service after the 17.4 update

It's not always the iOS update's fault!  Many things can cause phone problems.  If you tell people you think it's an iOS update, it might make it harder to fix or find a solution for the real issue.

Remember, the right question often leads to the solution!

iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. The majority of the issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone functions.

Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.

See what each update does: About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

I have had the same problem. The phone auto updated to the 17.4 and when it restarted wont connect to the celluar network. Connects to the WiFi with no problems.

I have reset the network connection and followed the guides on apple to get the network connected but no joy....

i have had the same issue with my iPhone 13 pro. This has happened during the most recent 17.4.1 update and the one before. The previous update caused me to loose my cell service for 2 days, and it randomly came back on. After the first time I tried everything such as resetting the network, and went to cell phone service provider - T Mobile, and reactivating the ESIM with them didn’t work. Nothing was wrong with the SIM card or tray. Two days later it started working again. It started working fine until the most recent update, and I woke up to the hello screen on my device, looking like it had updated overnight. As soon as I unlocked my phone that morning… my cell service was no longer there again. Please help!