iPhone not working after 17.2.1 update

After updating my iPhone last night to 17.2.1 I can no longer connect to my network provider. Tried the resets and still it does not work!

Complwte day is waiting all my business calls are suffering what kind of update is this ?

We did the update 17.2.1 and phone will not connect to network. Went to Apple Store, they want to charge 400 to fix phone. How is this our fault?? Phone was working just fine till update! Why is this not in the news? Class action suit? We are now without a working phone and have to pay to fix something that was working fine until Apples update! This is a APPLE PROBLEM NOT A CUSTOMER PROBLEM

After installing this update I’m facing heating and battery draining issues on my iPhone 15. Do we have any solution on this ?

Any information how to solve this network issue. No network is available since last night after update

Before updating my phone was good only, After I done the update 17.2.1, my iPhone 15 getting full hang, Never I faced this issue, I felt really very bad, so please clear that bugs in the next update.?

Has anyone heard when or if Apple is going to fix these issues? It is a major problem not being able to connect to cellular when traveling over the holidays.

Solved my problem after 8 hours of troubleshooting! After the 17.2.1 update, my iPhone 14 Pro Max would not send or receive calls and got hot from accelerated battery drain. First AppleCare walked me through hardware diagnostics, network resets, backups and restores but the problem persisted. Next, Verizon helped me with a new eSIM, but the problem continued. Next, I focused on my company's corporate software, because I was intrigued by the VPN discussion in this forum. While I don't use a VPN, my iPhone is managed by my company's installation of Microsoft InTune, which I noticed (Settings:General:VPN & Device Mgmt) had a signing certificate (IOSProfileSigning.manage.microsoft.us) that had expired December 12, 2023. To test this theory, I removed this Management software and my phone's cellular calls worked perfectly again! So for the final steps, I worked with my company's IT department to reinstall the Management software, which has an updated IOS signing certificate, and the phone is now back to normal. Sharing in case others find my painful tech journey useful.

Update 17.2.1

Iphone 12 pro max

never had problems with my iPhone before, now with this update my phone switch off by itself , after it’s not used.

to switching on again only with hard reset.

can be reversed the update?

Thanks

Exact same issue after upgrade to 17.2.1.

I use t-Mobile. I spoke with their support and also brought the phone to the store.

They replaced the SIM twice, first with an eSim and then with a brand new SIM card at the store.

No VPN profile installed. Still no IP on personal hotspot. Only infrequent internet on the phone. Most of the time I get a message that says I need to activate cellular data with my provider, even while the connection shows 4 bars of 5Guc.

Opened a ticket with Apple and sent diagnostic logs.

A major inconvenience over a busy travel season.

How do you fix no cellular service on a iPhone 12 after 17.2.1 update

Nothing to do with VPN. I don’t have VPN and it’s happening to me.

I’m facing the exact same problem after updating from iOS 16 to iOS 17.2.1. I do not have any VPN connection set up or whatsoever and my cellular data is completely broken which is a HUGE inconvenience on this holidays.

This is unacceptable. What concerns the most is that I swapped my SIM with an old spared iPhone I have and the connection is still nowhere to be found. I truly hope the update didn’t mess something up with the SIM’s OS.

Stop talking about VPNs when the guy said he has no VPN

My daughter has this same issue right now. There is something in this latest update that is causing this. We went into the Apple store, they went thru some stuff, told her to re-download the new IOS update, she did, and it worked for about 5 hrs before getting back to the same issue.

No, what it indicates is that VPN is very persnickety. THEY is your VPN provider. They have every detail of your mobile usage, and they are much less trustworthy than Apple.

VPN frequently creates more problems than it solves. But one important fact is that when you install VPN it configures itself to the specific hardware, iOS version and network that the phone uses. If any of those change it can break the VPN. So any time you change any of these you may need to delete the VPN app and profile, restart your phone then add them back (if you still want to use VPN) so it can configure itself to the new environment.

Here's Apple's advice on VPN→

Check VPN (Virtual Private Network) and third-party software to help resolve network connectivity issues - Apple Support

Something to think about→Don't use VPN - GITHUB

There are two legitimate purposes for using VPN:

• To allow access to a private network such as a school or business when you are not on site. 
• To allow access outside of a country with a repressive government that has restricted Internet access. (This has suddenly become more important)

Any other use is risky, and can lead to problems like the one discussed in this thread. VPN disguises your location by making you appear to be somewhere else in the world. But you usually can’t control that “somewhere else”, and if it is in a location that an app isn’t approved for the app won’t work. Plus the fact that the provider of the VPN knows everything about you and your location, as well as what sites you access through the VPN. So you are totally dependent on the VPN provider’s honesty. As a start, if the VPN is free, DON’T USE IT. The provider has to make money somehow, and if you aren’t paying them then they are selling your private data to make money. But even those that charge can’t necessarily be trusted. For example, a few years ago Avast was caught selling user browsing data. They claim they have stopped doing so. 

You don’t really need VPN when using public Wi-Fi, because all communications between your device and the servers it accesses are end-to-end encrypted.

If you want VPN for privacy about the sites you visit, that’s not a good choice as discussed; instead you should download and use the TOR browser.

The other use for VPN is to “steal” content that is not available in your area. I leave this question to your personal ethics.

With iOS 15.2 and later for iOS/iPadOS and MacOS Monterey 12.2 and later Apple now has iCloud+ Private Relay, which is not VPN, but provides a safer browsing environment than VPN, and it doesn't spy on you→About iCloud Private Relay - Apple Support