💡 If your device is running on iOS 26 or above, your settings should automatically update, so you won't need to do a thing 👍
However, if you'd like to double-check or you're running an older iOS version, use the below to manually update your settings 👇
If you're old school, we've also listed the written steps below:
How to set up your APN on iPhone (iOS 26 and above)
💡 Important: Make sure you are running the latest version of iOS software before updating your settings. Find out more here.
Go to Settings.
Tap Mobile Service.
If you have more than one SIM or an eSIM, tap the plan you want to update (for example, your SMARTY SIM).
Tap Mobile Data Network.
Under both Mobile Data and MMS, enter the following: mob.asm.net
Once entered, go back to save your changes.
Restart your iPhone to make sure the settings take effect.
Note: No need to change the settings back when you return to the UK.
👇 Also check:
Go to Settings > Mobile Service > Mobile Data Options and make sure Data Roaming is switched on (especially if you’re using your phone abroad).
That’s the only thing you have to change. If there’s any information in other fields, you can leave it as it is.
It should look like this:
Still need a helping hand? you can check out more here.