Issues connecting to cellular data on iPhone After Update

Same problem. Updated iPhone 12 from 17.3 to 17.4

after useless support conversation, remove sim and set in an another phone. SIM card now mark any networks (in manual mode) as forbidden. So somehow 17.4 broke physical sim, it’s not looks like coincidence

Glad to find out i am not the only person having this issue, i thought it was a me thing because i literally just switched over from a google pixel phone to this iPhone 13 and thought i got sold a piece of garbage…

Not a great look for apple as someone coming from andriod and immediately having a huge issue with the basic functionality of the phone haha… Among other reasons i am beginning to question my decision to switch back to iOS. :/

For those stumbling upon this topic, yes, can confirm that this is still an issue as of March 15th, 2024.

Had the issue on iOS 16.2.1, tried updating to iOS 17.4, and it is still an issue.

Going to try the Factory Reset method and maybe going back to and reinstalling an older iOS 16 version if possible, and will pray that works.

I had this issue on a brand new Iphone 14 pro max since updating to ios 17.4. Spoke with apple, gave them a lot of diagnostics and they said there is nothing wrong with the phone and to check with the carrier. Spoke with the carrier multiple times and they said to discuss with apple.

I’ve waited for the ios 17.4.1 update but still the same issue. I had signal but the mobile data would’t work and the hotspot and mobile data settings just dissapeared.

Tried absolutely everything from this thread, nothing would work.

Today I finaly did a backup and restored my phone from a mac. Now everythinf works just fine on 17.4.1. Apparently it is a bug with the 17.4 ios.

If you still have the same issue, just go ahead and restore your phone and you should be good.

2-3 trillions (whatever) dollars of company and because of their awful software update, I have to spend ridiculous amount of time and personally cover the damages that they have given to my phone&sim card. They literally destroyed the smart phone's top 1 reason of usage by their update. Shame. At least I saw, today's Apple has no advantages (even has disadvantages) over other phones in terms of stability.

I’ve managed to fix this problem by factory resetting and restoring my data which made all the settings go back to ordinary

i updated my iPhone 12 to iOS 17.4.1 and the cellular data has essentially stopped working all together.

Have the same things on IPhone 14 Plus.

The performance of the phone has deteriorated significantly, the connection is completely lost, and it shrinks 5 times faster. Only for a reboot, 10% of the charge is lost. The support said to wait a couple of days, but it didn't help anymore. What should we do?

hey I found a solution:

reset the entire phone then sign back in be sure to back up your phone before signing out. It may kick you off WiFi when trying to restore backup just change the WiFi you’re connected to

Ok, listen up:

After the 17.4 update i lost my service or at best it was very spotty. My number couldnt be verified, i wasn't able to receive or make most calls, and my iMessage went to green messages for everyone (even wouldn't send at times). I spent about 6 hours collectively trying to resolve the issue, 5 of those being on the phone with apple support and my carrier and we tried e v e r y t h i n g. Resetting my number, network settings, phone, iMessage, FT, running diagnostics, etc. We even switched me to an eSIM.

FACTORY RESET. I tried this as a last resort on my own before using my refurbished phone warranty to simply replace the device, and boom, everything is fixed. I did choose the “keep eSIM and erase data” option under reset.

Anyways, super frustrating issue and I imagine it can only be due to the update, but yup, save your time and fix it by backing up and resetting.

I have iPhone 13 Pro Max. It was great, when it was on 17.3.1. Right after update to 17.4 I have big issues with cellular - it just don’t work (right after every reboot of the phone I have about 2 minutes when it would work, after that if you want to continue to receive calls or use cellular internet, you need to reboot again).

I tried to reload from pc backup and to restore phone completely - nothing helped.

After Apple Store customer service checks, they made a conclusion, that there is a hardware problem with cellular. They said, that it could be fixed only replacing motherboard, which costs nearly 500$ in my location. To my question, why the problem appeared exactly after the update and there are a lot of people like me, they could not answer anything clearly. I could apply for trade-in program, but if my phone have only this problem they will give me 0$ discount, so I decide not to buy another iPhone :)

I really hope they will fix this in 17.4.1

This absolutely happened to me too. 13 mini, updated to iOS17.4 killed my cellular with verizon. I was on the phone with them for almost 2 hours, they finally sent me a replacement mini- basically telling me that the new update some how fried my ability to accept eSim. We tried everything, looking at this thread- I feel fortunate that they were willing to send me a replacement phone (considering I don't have phone insurance). I received my phone today and low and behold, I have to update it to the newest iOS before I can set it up... crossing my fingers it actually works. This is a serious iOS problem- I can't believe this has been going on since at least December.

My daughter downloaded tge I phone update 17.4 and now can not make phone calls, three days now!! Missing business calls that will affect her job.

I found this article about VPN being an issue on a different area of apple chat. We haven’t tried it yet, but hopefully it will help you!

After iOS 17.4 update Wi-Fi doesn't work … - Apple Community

I have experienced my phone not being able to connect to data after the update and missing calls

I went to Verizon and they replaced the SIM card. A new SIM card immediately fixed the issue. They told me they've been seeing a lot of these issues lately.