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 13, 2024 9:44 PM in response to AlexpnUK

My issue is with hotspot not allowing my Galaxy Watch 4 connect to it. Before iOS 17.2, there were no issues. Watch shows "IP configuration failure" when I try to connect to iPhone's hotspot. Apple stopped signing 17.1.2 firmware the same day when I was trying to go back. :( This is on my iPhone 12 Mini. I reset the device twice and set it up "as new" phone, nothing helped. It is interesting that other devices such as Pixel 8 and Galaxy S23 are able to connect to my iPhone 12 mini but not my watch.

Jan 16, 2024 11:21 PM in response to Hedgehog64

I'm sorry but tired of how we pay for so much stuff that promises us the better life and yet it never works. He always always ducking with. It never works never better your life at all actually just makes it worse. I'm all these big corporations like Apple android well we didn't guarantee it it will give you a better life we just guaranteed that you could buy a product from us pretty much, I'm tired of this crap I'm tired of being guinea pig I wanna get paid for this crap I gotta test your **** out tell you about it so you can fix it because you didn't test yourself who with me on that many phones are broke. I'm just aggravation of the freaking phone that doesn't work like it supposed to hate it. I hate all technology know I'm gonna go with the canon string again.


Jan 17, 2024 3:04 AM in response to Hedgehog64

never had any issues with other updates. This past update as soon as it was done installing my battery draining issues began. Even while charging the battery drains. I put in battery saver mode and the same happens. I have to completely leave my phone alone and not use any app to get it to charge properly and then it’s still slow. My battery functionality level is the same as it’s been for months. This problem only started less than 48 hours ago after the update. Fix this asap

Jan 17, 2024 3:20 AM in response to Hedgehog64

The personal hotspot functionality only works intermittently, and even when it does, it blocks VPN (not on the phone, but on the connected/tethered device). Some kind of **** went into this update, which is likely why Apple was secretive about the changes it made.


Honestly, I've had it. I had to postpone a business lunch because of it. I am looking at Android phones now.

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iPhone not working after 17.2.1 update

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