How to Fix Apps Not Working on Cellular Data After iOS 18 Update?

cellular data on my iPhone 15 after iOS 18 is not working

After the upgrade to 18, no apps work, they just keep spinning. I've restarted several times. Forgotten wifi and reinstalled, done all the things online recommended and still just spins on every app. This is the worst upgrade ever. Other than texting and phone calls, my phone is worthless.

I have a problem that I believe is the same as the OP. iPhone 14 Pro, recently updated to iOS 18. Here's the behavior I'm seeing: For all the apps listed in Settings > Cellular > Show All

• If Cellular Data was ON (green) before the upgrade, and I turn it OFF (grey), it will revert to ON as soon as I leave the settings screen (e.g. to return to the app)
• If Cellular Data was OFF (grey) before the upgrade, and I turn it ON (green), it will revert to OFF as soon as I leave the settings screen

In other words, all apps listed in Settings > Cellular > Show All are stuck in whatever they were set to before the upgrade. The toggle buttons can be moved, but the new setting won't take hold. The short list of apps in Settings > Cellular (i.e. not under Show All) can be toggled on and off as expected.

Kind of same here. I am on I phone 12 pro and after iOS 18 update, my phone can't connect on wifi and mobile data. I've tried all the recommends that i've read on internet about How to Fix iOS 18 Wifi Issues etc but nothing works for me.

Did you ever figure out how to fix this? Having the exact same issue

Yep me too. They should have never released iOS18 it’s absolutely terrible.

None of my apps work when I’m in the store. They bricked CVS, Walmart, Target, etc. Can’t look up anything and can’t pay using the app so you can skip the lines.

And don’t even get me started on the fact that iTunes, Messages, or Siri no longer works in the car while using Apple Car Play, or the fact they killed off half the Widgets I had before the upgrade.

Like Apple did you even Test this release before you released it??? As an investor in this company I’m acutely worried about the lack of quality control and testing.

i got a brand new 15 pro max my cellular data does not work at all it shows me 5g 5g+ and nothing loads as soon as I’m on WiFi everyone work a PLEASE for f sake fix this issues a lot of work from our phones this is absolutely unacceptable

Hi,

I am facing the same issue -- updated foolishly to the iOS18 beta on iPhone XS (while abroad) and could not connect to the cellular network at all! miserable a nd stressed me out since i am not home!

I am still working with Apple tech and sent them all of the details they requested but i think i have a temp fix.

IOs18 is messing up connectivity with 5G so when you switch manually to 4G network - it connects fine and everything works --c alls, texts, data without wifi.

How do you switch to 4G manually?

Go to settings -- general> select your cell sim line > turn it on >network selection -- turn off the automatic selection toggle and manually select whichever 4G option is available in your area.

make sure your data roaming is also on along with your cellular data option pointing to the right active line,

Also, what I did last two days (not sure at this point all that was needed! ) but maybe:

1. I erased my phone completely AFTER making an iCloud backup of everything.

2. Restored the IOS using my mac -- does not take too long with wifi

3. Set up my iphone as new -- this is imp if you want to avoid downloading any software glitches that may have been previously.

4. backed up my data using my Icloud -- this took a long time for me given the photos/texts/emails etc.

Hope this helps others!

I’m having the same issue. I’m on an iPhone 11 - which has worked perfectly without any issues.

I updated to iOS18 a few days after it was released and now my phone really struggles keeping a network connection active. (Wi-Fi works fine.)

It’s really irritating because the moment I leave a WiFi area, my phone becomes useless. I’ve tried: restarting; switching to airplane mode & back on after 1min.; toggling data off and back on; and other usual fix-its but none work.

Has anyone found a fix to this? Been without internet now (except WiFi) for over 3 days since I updated to IOS 18.01… losing work (and money!) because of this. Apple aren’t helpful at all as per usual

Apps Not Working on Cellular Data After iOS 18 Update maybe something wrong with the cellualar setting , you can go to setting - cellular to see which app is able to use the internet, or reset all nework settings( setting- general - transfer and reset iphone - reset - reset net work settings) this will not loss your data , then try again, if this not working, try to fix ios 18 wifi & cellular issue by other way on the inter net, good luck!

I have iPhone SE 3rd gen and after the latest 18.0.1 update half my apps won’t work with my cell data only in WiFi I’ve reset my phone to factory even bought a new sim chip thinking that was it but it’s not it’s the update it stoped working right after the update 18.0.1 it fine on the 18.0 update

same happen to my iphone 15 plus.. i have been cracking my head just for it to be okay.. and already tried everything that was on the internet and still no avail... can someone here already fix this problem? please let us know... and thank you so much

I did restart several times. Does not work. Can't go directly onto a website or use any APPS - just get the spinning wheel. iPhone 11 Pro Max. All works when connected to Wi-Fi but not when wi-fi is off and bluetooth is off.

Since iOS 18.01 I can’t do banking nor operate my Tesla through the app. This is an urgent matter that all iOS users require an immediate remedy. In this day and age it should never have been allowed to happen!!!