If your iPhone shows "Carrier Settings Update Failed" or the update prompt disappears without installing, don't worry — there are several reliable ways to force the update through. Here's how to fix it on any UK network.
📋 On this page
Why Carrier Settings Updates Fail on iPhone
A carrier settings update failure usually comes down to a connection or timing issue. Common causes include:
- No internet connection — the update requires Wi-Fi or mobile data to download
- Dismissed the prompt accidentally — tapping "Later" or "Not Now" on the update pop-up
- Apple's servers temporarily unavailable — rare, usually resolves within minutes
- Outdated iOS version — very old iOS versions may not support the latest carrier bundle format
- SIM not properly seated — the iPhone can't identify the carrier if the SIM is loose
- MDM or enterprise profile conflict — a mobile device management profile blocking carrier updates
How to Fix a Failed Carrier Settings Update
Fix 1: Reconnect and retry
- Connect to Wi-Fi (more reliable than mobile data for this).
- Open Settings › General › About.
- Wait 15 seconds. If the update is available, the prompt will reappear.
- Tap Update immediately — do not dismiss it.
Fix 2: Restart and retry
- Restart your iPhone fully (power off, wait 30 seconds, power on).
- Connect to Wi-Fi.
- Go to Settings › General › About again.
- A restart often clears a stuck update process.
Force Update via iTunes or Finder
If the over-the-air update keeps failing, use iTunes or Finder on a computer to apply the carrier settings directly:
- Connect your iPhone to a Mac or Windows PC via USB cable.
- Open Finder (Mac with macOS Catalina or later) or iTunes (Windows or older Mac).
- Select your iPhone in the sidebar.
- Click Check for Update. Finder/iTunes will contact Apple's servers and check for the latest carrier bundle for your SIM.
- If a carrier update is available, you will be prompted to install it. Click Update.
- After the update completes, disconnect and toggle Aeroplane Mode on then off on your iPhone.
This method bypasses the over-the-air update process and works even when the Settings › About route keeps failing.
SIM Removal Trick
Removing and reinserting the SIM often triggers the carrier update prompt to appear fresh:
- Power off your iPhone completely.
- Use a SIM ejector pin (or a straightened paperclip) to open the SIM tray.
- Remove the SIM card and wait 30 seconds.
- Reinsert the SIM firmly and power the iPhone back on.
- When the phone finds the network, go to Settings › General › About — the update prompt often reappears immediately after SIM reinsertion.
If the Update Still Fails
- Update iOS — go to Settings › General › Software Update. An outdated iOS version can prevent carrier bundle installation. Update to the latest iOS first, then retry the carrier update.
- Reset Network Settings — Settings › General › Transfer or Reset iPhone › Reset › Reset Network Settings. This clears any conflicting configuration, then retry the carrier update at Settings › General › About.
- Contact your carrier — if the carrier settings update keeps failing, your network may need to re-provision your SIM or push a bundle update on their side. Call customer support with your IMEI and SIM number ready.
- Visit an Apple Store — if you believe there is a hardware issue preventing updates, Apple can diagnose and apply carrier settings in-store.
Frequently Asked Questions About Carrier Settings Update Failed
Why does my carrier settings update keep failing?
The most common reasons are a weak or absent internet connection, accidentally dismissing the update prompt, or a temporary issue with Apple's update servers. Connect to Wi-Fi, restart your iPhone, and go to Settings › General › About to trigger the prompt again. If it keeps failing, use iTunes or Finder on a computer to force the update via USB.
How do I manually update carrier settings on iPhone?
Connect to Wi-Fi and go to Settings › General › About. Wait 15 seconds for the update prompt to appear and tap Update immediately. Alternatively, connect to a computer via USB and use iTunes or Finder to check for and install carrier updates.
Can I update carrier settings without Wi-Fi?
You need either Wi-Fi or mobile data for the over-the-air update. If your mobile data is not working, connect to Wi-Fi first. Alternatively, connect to a computer via USB and use iTunes or Finder — this method does not require a wireless connection on the iPhone.
Does a failed carrier settings update affect my phone?
A failed update leaves your existing carrier settings unchanged — it does not damage or corrupt your current settings. You can continue using your phone normally. However, if your network has pushed important APN or VoLTE changes, you may experience data or calling issues until the update is successfully installed.
I dismissed the carrier settings update — how do I get it back?
Go to Settings › General › About and wait 10–15 seconds. The prompt usually reappears automatically. If it doesn't, try restarting your iPhone or removing and reinserting the SIM card, then checking Settings › General › About again.