Hi ​@Qthefrex  

I can see why it’s confusing, especially when it keeps inserting an Irish (+353) code after you’ve already tried resets.

This is almost always caused by the number being stored or cached in international format on the phone (not the SIM itself), especially after travelling.

Try these quick fixes:
Check your contact details
Open your own contact card
Make sure your number is saved in UK format (+44), not +353
Delete and re-save it if needed
Check “My Number” on iPhone
Settings → Phone → My Number
Manually set it to your correct UK number
Delete and re-add your contact
Remove the contact completely
Recreate it fresh using UK format only

Network refresh
Toggle Airplane mode ON/OFF Or restart the phone after changes
Last step if still happening
Settings → General → Transfer or Reset iPhone → Reset Network Settings

This is very unlikely to be a SIM fault,  it’s usually a saved number formatting or iOS region cache issue after roaming.

Lamiya

Thank you Lamiya 

As it turns outs it was the Sim - deleted the old e-sim and got a new one - now all working great 

Hi ​@Qthefrex.

Thank you for your update.

I’m glad to hear that the issue has now been resolved after replacing the eSIM and that everything is working as expected again.

If you experience any further issues in the future, please don’t hesitate to get in touch with us.

We’ll be happy to help.

Thanks,

Marquerita

The iD Mobile Team