4G Not Working on iPhone

Does your mobile network support 4G?

Step	Action	What It Fixes
1	Check your network network status	Confirms if issue is network-wide
2	Toggle aeroplane mode on/off	Re-registers SIM on your network network
3	Restart your phone	Clears temporary network errors
4	Check your network APN settings	Fixes incorrect data configuration
5	Re-insert SIM card	Fixes poor SIM contact issues
6	Contact your network support	Resolves account or SIM faults

Yes, your mobile network has an active 4G network across the UK, with coverage continuing to expand. To use 4G on your mobile network, you need a 4G-capable device, a your mobile network SIM on a 4G-enabled plan, and to be within your mobile network's 4G coverage area. Check coverage at the UK APN Hub.

How to enable 4G on your mobile network

On Android: Go to Settings → Network & Internet → Mobile Network → Preferred Network Type and select 4G/4G/3G/2G (auto) or the highest available option. On Samsung, go to Settings → Connections → Mobile Networks → Network Mode.

On iPhone: Go to Settings → Mobile Data → Mobile Data Options → Voice & Data and select 4G. If the option is not visible, your iPhone model or carrier plan may not support 4G on your mobile network.

your mobile network 4G APN settings

The APN settings for 4G on your mobile network are the same as the standard mobile data APN. Your phone should use 4G automatically once it is enabled in your network settings. If 4G is not appearing in the status bar despite being in a covered area, try toggling aeroplane mode, restarting your phone or resetting your APN settings to your mobile network defaults.

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Fastest way to apply new APN settings

After saving, turn aeroplane mode ON for 10 seconds, then turn it OFF. This forces an immediate network re-registration — quicker than a full restart and equally effective.

Troubleshooting your mobile network 4G problems

4G not showing: Check your plan includes 4G. Ensure your device supports 4G. Verify you are within your mobile network 4G coverage. Go to network settings and set the preferred network type to include 4G.

4G slow: 4G speeds vary by location, network congestion and signal strength. Move to an area with a clearer line of sight to a mast. Ensure no background apps are consuming data. Contact your mobile network if speeds are consistently poor in your area.

4G connected but no internet: Check APN settings are correct for your mobile network. Reset network settings. Try switching to 4G, testing mobile data, then switching back to 4G.

Follow these steps in order — most issues are resolved by step 1 or 2

Frequently Asked Questions

Why is your network mobile data not working?

your network mobile data may stop working due to an incorrect APN, a temporary network outage, an expired data plan, or a SIM issue. Follow the steps in this guide to identify and fix the cause.

How do I reset my your network APN settings?

On Android: go to Settings → Network → Mobile Networks → Access Point Names, then tap the menu and select 'Reset to default'. On iPhone: go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings.

Does your network have a network outage in my area?

Check the your network website or their social media channels for real-time outage information. You can also check third-party sites like Downdetector for user-reported your network outages.

Why does your network show signal but no internet?

If your network shows signal but no internet, the APN settings may be incorrect or missing. Check the APN settings on your device and compare them to the correct your network values in our APN guide.

How long does a your network outage usually last?

Most your network network outages are resolved within a few hours. For planned maintenance, your network usually notifies customers in advance. Check the your network status page for current updates.