O2 4G APN Settings

Does O2 support 4G?

Yes, O2 has an active 4G network across the UK, with coverage continuing to expand. To use 4G on O2, you need a 4G-capable device, a O2 SIM on a 4G-enabled plan, and to be within O2's 4G coverage area. Check coverage at the O2 APN hub.

How to enable 4G on O2

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 O2.

O2 4G APN settings

The APN settings for 4G on O2 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 the O2 defaults.

Troubleshooting O2 4G problems

4G not showing: Check your plan includes 4G. Ensure your device supports 4G. Verify you are within O2 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 O2 if speeds are consistently poor in your area.

4G connected but no internet: Check APN settings are correct for O2. 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