No service after recent iOS update

[Mark8]

After the most recent upgrade on my iPhone (15.2.1), I am now having trouble getting and keeping cellular service. The phone keeps displaying the message: ‘cellular network unavailable until carrier update performed’,  yet when I go into my settings there are no updates available. 

A little troubleshooting shows that after I reset the network settings and force restart, it will sometimes regain service for a short period of time, then it goes dark on me again. I have tried removing my the SIM card, that does nothing. 

Has anyone else been dealing with this? Will there be a carrier update coming out soon? What should my next step be to sort this out? 

[Camera4617]

@hTideGnow I'm not the OP.. 🙂

[hTideGnow]

hi @Camera4617   @Mark8 

I would try to connect the phone to the computer and make sure everything is updated with iTune

If it still fail, run a full backup and try Factory Reset

[Camera4617]

I'm on iPhone and iOS 15.2.1 without any issues.. Where do you go in Settings to check for carrier update?

[Mark8]

Yes, there are no more updates available

[darlicious]

@Mark8 

It sounds like you have done all of the normal troubleshooting but just in case since you didnt mention them:

1. Toggle airplane mode on/off.
2. Change networks from 4G LTE to 3G.

Otherwise what has been suggested for this iOS update glitch is either:

1. Downgrade to iOS 14.1
2. Factory reset after back up of data.

To contact customer support click below:

https://productioncommunity.publicmobile.ca/t5/notes/composepage/note-to-user-id/22437

To pre-verify your account include your full name, address, email, phone # and 4 digit acct pin #.

[0PX9O4]

@Mark8 

Even though this won't help you: We haven't heard reports lately from other iPhone users.

I suspect that needing an update from the carrier is not the real problem here. I see no reason having an older version of the baseband would render your phone unable to connect to the network. There hasn't been a major change to the frequencies or basic configuration of the Telus network recently.

[Anonymous]

 @Mark8 : Can you connect to wifi (not cell data) and go into About phone and check for updates.

[Mark8]

iPhone 7, purchased years ago from groupon. Apple service directed me to contact the network provider and ask about carrier updates

[0PX9O4]

@Mark8 

I would contact Apple first.

What iPhone is it? When and where did you buy it? It sure sounds like a warranty issue, if your phone is still under one.