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!

very frustrating.

Trusted Apple and iPhone for years, now not so sure

Posted on Dec 21, 2023 8:24 AM

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Posted on Dec 28, 2023 10:22 AM

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.

370 replies

Jan 3, 2024 12:24 PM in response to Hedgehog64

I'm facing network issues on my iPhone 15 Pro without even updating to ios 17.2.1 and it's really frustrating. I'm currently on ios 17.2.


From past 2-3 weeks, I am frequently not able to make calls even after both caller and receiver having signals.


If I do able to connect, the voice gets disconnected in between.


Once, mobile data was not working but in my friend's iPhone having ios 17.0 and the same network provider I'm having, was able to browse the internet.


This pretty much proves that something is wrong with ios.


We shell above 1000 bucks on a phone and it doesn't connect to internet, can't make calls, and what not.


I'm fond of Mac so decided to pick iPhone for the first time expecting similar, good xp.


Please fix the issue, Apple!


(From India)

Jan 3, 2024 5:54 PM in response to Hedgehog64

I've also got a problem with this update with the alarm as it no longer works properly. Before I was able to customise my alarm with any song in which case I would choose the loudest to wake up as I tend to sleep through alarms. However with the new update the alarm ringtone is stuck on the provided ones by apple and they aren't. Effective at all as they simply turn off after only one ring. It's a terrible feature the older alarm features were so much better


Jan 7, 2024 1:54 PM in response to GoldieSFC

I am quite certain it will just show the latest update to install. Just like when you buy a new phone it always needs to be updated and often times it’s way outdated software. But it only requires one update to get it current. I’m not sure if it’s just certain model phones that are having a problem. People should start listing on this discussion what model phone they have. Mine is iPhone SE 2nd generation and it is not affected.

Jan 7, 2024 6:54 PM in response to Hedgehog64

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

Jan 8, 2024 8:31 AM in response to vitesh194

I’m having the same issue with my iPhone 12. Went to Genius Bar and they said there’s nothing wrong with my phone and it must be a software issue but I also have an error on my Apple ID settings saying some services need you to log in again but then it won’t allow me to continue not sure if that’s related. All started the day I updated. I suggested it was the update and they said no it can’t be 🙄

Jan 9, 2024 3:09 AM in response to Hedgehog64

The problem may be along these lines please see the link, to an article the 17.2 was an emergency update because of spyware, hacking, etc. 17.2.1 was rushed out, shortly after 17.2. Very suspicious. Spyware, malware, something, damaged your hardware.


https://www.forbes.com/sites/kateoflahertyuk/2023/12/12/ios-172-apple-just-gave-all-iphone-users-12-new-reasons-to-update-now/?sh=2b2213b541ac

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iPhone not working after 17.2.1 update

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