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Steps To Fix “Cellular Update Failed” On iPhone

Are you wondering to fix “Cellular Update Failed” on iPhone? Some iPhone users said that their cellular connectivity and cellular data failed recently, with iPhone stop working to send or receive calls or to access the internet. Specifically after installing or downloading the iOS 12.1.2 update, iOS 12.1.4 or iOS 12.1.3, updates.

The impotence for iPhone to have cell network connections go by a “No Service” message located in the top left corner of the iPhone screen. Here the reception or carrier signal is typically displayed. Certainly, a notification appears on the iPhone screen saying:

“Cellular Update Failed – Your iPhone can’t send or receive calls or access cellular data until it has been updated.”

In this article, you’ll learn some methods to try and get cellular data and cell service working again on an iPhone.

But before anything else, you have to check for the available iOS system software updates. However, if an iOS update is available then you should install it. Also, move in Settings > General > Software Update, or by connecting the iPhone to iTunes on the PC and checking for updates there.

Remember that for some users the below tricks might fix the “No Service” and “Cellular Update Failed” issue on their iPhone. But it does not for other users. Another very irritating method is to just reboot the iPhone every time you want service. However, it looks to enable the iPhone to have cellular service for a short while. Steps to force reboot the different iPhone versions are further below under the extra troubleshooting steps.

How to Resolve “Cellular Update Failed” and No Service Issue on iPhone via iOS 12.1.2, iOS 12.1.3, iOS 12.1.4

“Cellular Update Failed” On iPhone

Maybe you can fix the No Service cellular issue with iPhone by moving to the following method of erasing the SIM card and restarting the iPhone:

Step 1:

Switch off the iPhone

Step  2:

Erase the SIM card from the iPhone

Step 3:

Enable the iPhone back

Step 4:

Put the SIM card into the iPhone again

Wait a while and the iPhone should regain cellular service and the “No Service” error removed. Rarely, you probably want to reboot the iPhone one more time.

How To Adjust Cellular Settings

The other current methods to temporarily fix this cellular data issue on iPhone involve turning off the wi-fi calling and adjusting LTE data settings to be data only besides voice and data. For some users, this might be unacceptable as a permanent fix, but again this is a method. So you must decide whether or not the trade-offs of temporary turning off wi-fi calling and LTE voice are worth having a cellular data connection at all.

Step 1:

Head over t0 the “Settings” app on the iPhone with the cellular data issue

Step 2:

Then move to “Cellular” settings

Step 3:

Select “Wi-Fi Calling” and disable the wi-fi calling feature. This alone might fix the issue for some users

Step 4:

Then move back to Cellular settings, this time selecting “Cellular Data Options”

Step 5:

Click on the “Enable LTE” and choose  “Data Only” as the setting

Step 6:

Return back to the Settings

For lots of iPhone users, their cellular service will recover and begin working again. However, it comes at the expense of temporarily losing voice LTE or wi-fi calling. Some iPhone users might find that only selecting one of the above settings modification is enough to remedy their cellular issues too.

You can also reboot the iPhone for these settings modifications to take effect. But after doing so certainly can’t hurt anything. A complex reboot isn’t necessary, so just disabling or enabling the iPhone should do the trick.

Install & Check Cellular Carrier Updates

Some iPhone users might get a “Cellular Update Failed” error message on their phones. In this case, they must try to check for a carrier settings update to the iPhone using the cellular service provider. You can also install one if it is available. These are the updates from your service provider that are separate from general iOS software updates from Apple. Here is how to check and install a carrier update, if one is available:

Step 1:

Connect the iPhone to a wi-fi network if it is not connected to anyone

Step 2:

Head over to the “Settings” app on the iPhone then move to “General”

Step 3:

Select “About” and move down to the ‘Carrier’ section, then wait a while, if a carrier update appears to click on “Update” to install it on the iPhone

Not everyone has a carrier update available, but you must check to view if you do. Also, some users have their iPhone cellular connectivity problems fixed just by installing such a carrier update, so you must worth checking it.

Extra Cellular Issues Steps

“Cellular Update Failed” On iPhone

If you tried all the above-mentioned steps and you continue to experience iPhone cellular connection issues, you might want to try the following troubleshooting steps:

  • You must forcibly restart the iPhone, the process for doing so is different on lots of iPhone devices.
  • Also, reset the network settings on the iPhone, though be mindful that you want to jot down internet passwords to re-enter them with other network customizations.
  • If the iPhone can send and receive calls, but can’t send or receive data, then try these tricks for cellular data stops working on the iPhone.
  • Backup the iPhone to iCloud or iTunes, then recover the iPhone from that backup
  • Check for general system software updates in iOS by moving to Settings > General > Software Update
  • Also, contact your cellular provider, and/or Apple, for further queries. If none of the above methods and steps have fixed your iPhone cellular issues. You might want to overhead your troubleshooting to official sources

I had direct experience troubleshooting this specific iPhone cellular issue during the holidays when your cousin iPhone lost all cellular capability after installing or downloading the latest iOS software update. Where the iPhone became stuck on “No Service” and having the “Cellular Update Failed” message constantly appearing on the display, can’t do anything online. Just consider that an iPhone is a cellular phone, not having cellular connectivity is understandably irritating.

If the cellular issues are the result of an error with an iOS version. Then the latest update to iOS will resolve the issue completely. As it is unclear if and when that will happen. Besides, it’s always good advice to stay up to date on system software updates. If the latest software update can fix known cellular data issues with the iPhone. Then you’ll almost certainly need to modify the LTE data setting back to Voice & Data. Also, you can turn on wi-fi calling on the iPhone again so that you can use those amazing features as usual.


Did the above methods work to fix your cellular data and cellular connectivity issue on iPhone? Did this fix your “No Service” error and the “Carrier Update Failed” error messages on your iPhone? Do you have other methods for remedying these issues with your iPhone service? Let us know your thoughts in the comment section below!

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Alex Joshua

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