How to restore mobile data functionality post iOS 17.4.1 update

I lost access with ios 17.3.1 and iphone message was update iphone software to fix. This was problematic as it kept hanging on verifying update. Downloaded the update on Windows 11 pc using iTunes. Performed update successfully to ios 17.4.1 but still getting error and cannot connect. Australian user using Telstra 5G/4G network.

Come on apple this is getting ridiculous. Cannot see how it cannot be software related; the only common factor here is IOS!!!!

For everyone facing this issue, the chances are high that you need to install a carrier settings update. See this on how to do that

1. Make sure that your device is connected to Wi-Fi or a cellular network.
2. Tap Settings > General > About.
3. Follow the onscreen instructions to install your carrier update.

same thing. nothing working.

It surely is not iOS 17.4.1 because...

I conducted a thorough search of this forum using the term 'WiFi after iOS' and uncovered numerous posts detailing similar issues across various iOS updates. This suggests that iOS updates may not consistently be the root cause. Below are a handful of examples extracted from over 4,000 search results:

"After iOS 17.4.1" will be an addition to this list posted by you.

• loss of wifi after upgrade to ios 17
• Wi-Fi won't connect after iOS 16.6 update
• IPhone stuck on “choose a wifi network” after upgrading to iOS 15
• Problem with Wi-Fi after iOS 16 update
• broken wifi after IOS 14.5.1 update
• Cannot connect to wifi after updated to ios 15.3.1
• Iphone 7 Wifi Not Working After IOs update
• iPhone X software update error after iOS 16.5 on wifi.
• no wifi access after iOS 17.0 download

It surely IS a problem by IOS. My phone was working completely fine until it updated to 17.4.1 (21E236). My cellular data just show LTE now !!! And the only way I can access internet now is by Wi-Fi ! I paid for this piece of… I expect optimalised and tested updates. Not updates that ruin the most basic functions of my phone. Gonna switch to Android asap.

After Speaking to Apple and AT&T for a few hours and trying many of the same solutions that people suggested:

• Airplane mode
• Restart Phone
• Reset Network settings
• Refresh Connection (AT&T Dashboard)
• Delete eSIM and add new eSIM

I was told that factory reset may be the only possible option, and it seems to have worked>

I deleted all data but kept the eSIM and then restored from the most recent iCloud backup. As the backup is now populating the data back onto the device I was successfully able to make an outgoing call, and my number shows up in the iMessage settings as before.

Strange, because the iOS is still 17.4.1,

BUT THIS SEEMED TO BE SUCCESSFUL

Sorry it said No Sim Available

If you have an iCloud backup PRIOR to this recent iOS update, use that to restore after a factory reset and that worked for me!

Yes, mine too! I had deleted all of my saved Bluetooth devices only to find out that under IOS 17.4.1 none of my Bluetooth devices will connect to my iPhone 12 Pro Max! I was in a medical facility this morning and one of their Bluetooth enabled TVs and my iPhone was able to sync up. Strange thing is that the device never showed in my sync'd list???? the DEVICES search cursor just keeps spinning!

i believe the latest iOS releases are blocking certain frequencies and network IDs being exchanged with your cellular service provider. That is why, iPhone keeps searching for cellular service.

I fixed this issue by getting the latest physical SIM from my cellular service provider and inserting it in my iPhone. If your iPhone supports eSIM, delete it and revert back to latest physical SIM.

hope this helps!

same situation for me. no imessages, calls, or using my phone off wifi besides standard text messages - after my phone automatically updated 17.4.1 overnight.

i've tried airplane mode, turning cellular on and off, reset network settings, i get the pop-up to update carrier settings, i click update, and nothing happens. i've tried 15x. turned on and off, tried again. still nothing.

it's been >24 hours now, when i contacted both apple and AT&T all they could tell was my phone was "trying to verify and would connect with my carrier within 24 hours."

This is my exact issue. My phone updated automatically last night. I can connect to WiFi but my data isn’t working. I can’t make or receive phone calls and all my texts are green!! Apple please fix this!

The morning after 17.4.1 update, my iPhone 15 Pro was frozen. After hard reset, iPhone wanted to be restored from a Mac. Unable to restore.

Apple store had to repair my phone.

Apple we need a solution to this. I can’t get in contact with anyone. This is majorly inconvenient and I refuse to “pay for repairs” that were not my fault!

…. and since the update I’m finding that the appearance of mail has changed negatively on both the iPad and the iPhone. In particular, when I press to reply to an incoming email, the reply window that comes up is now a small window within the original screen. I find that if I press on the 3 dots at the top of the reply window I can select ‘full screen’, but I don’t want to have to do this every time, and when my reply has been sent, it reverts to the small window next time! Also, the text size of the incoming message is smaller than it used to be. Now Apple, this, and all the other problems which people are mentioning, certainly need to be sorted out. Sent from my iPad