Three APN Settings on OnePlus
What this means: Three APN Settings on OnePlus means this feature is not working correctly. Follow the steps below to diagnose and fix the issue on your OnePlus with Three.
- Open Mobile Network → Access Point Names
- Delete any incorrect existing APN entries
- Enter exact APN values for your carrier
- Save and restart your device
ℹ️ About Three — APN Settings
Three operates on the Three (own network). Three's Feel At Home roaming covers 71 destinations. iD Mobile and SMARTY also use Three's network.
Known OnePlus considerations: 5G coverage mainly in city centres. eSIM supports dual-SIM on compatible devices.
- Support number: 333 (from your Three SIM)
- Support page: https://www.three.co.uk/support
- Network status: Check Three network status
How to Set Three APN on OnePlus
Open APN Settings
Go to Settings → SIM & network → [SIM] → Access point names. You will see a list of saved APN profiles.
Add a new APN
Tap the + or Add button to create a new APN profile for Three.
Enter APN name and value
Set Name to Three. Set APN to three.co.uk.
Enter credentials
Username: (leave blank) Password: (leave blank).
Save and select
Tap Save. Select the new Three APN by tapping its radio button.
Toggle Airplane mode
Enable Airplane mode for 10 seconds then disable to apply the new APN.
Test mobile data
Open a browser and load a page to confirm data is working on Three.
⚡ Three APN Settings Reference
| Setting | Value |
|---|---|
| APN | three.co.uk |
| Username | (leave blank) |
| Password | (leave blank) |
| MMSC | http://mms.um.three.co.uk:10021/mmsc |
| Three Support | 333 |
Frequently Asked Questions
What is the best way to fix APN Settings on OnePlus?
Start by toggling Airplane mode, then restarting the device. If that doesn't work, check the APN at Settings → SIM & network → [SIM] → Access point names — confirm it is set to three.co.uk. If still failing, reset network settings and contact Three on 333.
Do I need to contact Three to fix this?
Most APN Settings issues on OnePlus can be resolved by following the steps above without contacting Three. If the problem persists after all steps, call Three on 333 — they can check for account-level or network-side issues.
Will a network reset help with Three on OnePlus?
Yes — a network reset at Settings → System → Reset options → Reset Wi-Fi, mobile & Bluetooth clears corrupted APN settings and network configurations. Remember to note your Wi-Fi passwords first as they will be cleared. Re-enter the Three APN (value: three.co.uk) after the reset.
📞 When to Call Three
If all steps above have not resolved the issue, call Three on 333 (free from Three). Ask them to check data provisioning, account status, and any local network events.