VoLTE and VoWiFi missing after iOS 18.6.1 update on iPhone 11 Pro

Very_Fluffy_Minion wrote:

I was able to test with another iPhone 11 which was freshly installed with iOS 18.6. The issue was present there as well.

That brings me to the following conclusion: The iOS update is not to blame. And secondly the problem is caused either by a faulty SIM card or some configuration issues with my network carrier account. I am going to address both issues on Monday hoping that in a case of an escalation more senior staff will be available.

Thanks a lot for all your input and help. I will update this thread once the issue will hopefully have been resolved.

I'm glad you confirmed. It's almost NEVER an issue with the phone if you can't connect to cellular bands. It's almost ALWAYS a carrier issue.

You're welcome and good luck getting your carrier to resolve the issue for you.

When phones update, there is often a carrier update included, but often not seen behind the scenes. Apple doesn't provide cellular service, so if you're having an issue with your cellular service, which it appears you are, you contact your carrier for help.

Sounds like you carrier needs to update you account, so contact your carrier for help.

You can certainly wait until tomorrow if you want. If it was me having such an issue, I'd be on the phone with carrier now.

Think about it this way. If the update caused such an issue, it would cause such an issue for everyone and this, the worlds most visited forum about iPhone would be flooded with people complaining. Yet, it's not.

Very_Fluffy_Minion wrote:

You are right.

On the other hand my carrier (fourth largest in my country) should already be aware of such an issue. But so far I couldn’t find anybody else complaining about it. Strange.

The next challenge (after the test tomorrow) will be how to get through to somebody on my carrier's side who knows what I am talking about and who can take the appropriate steps to roll out a carrier update.

I wish you luck. A tip: Carriers LOVE to play the blame game. If you don't get someone who has a clue what they're talking about, insist on elevating your call to a more senior level technical support person. Here in the US, the people who take calls aren't often technically savvy and only have a goal of getting you off the phone as quickly as possible.