Hi ​@LKS123,

I'm really sorry to hear you're experiencing issues with your calls. Please try the steps below:

Go to Settings.
Tap Phone.
Tap My Number.
Use the delete button to remove the old number.
Use the keypad to enter the new number, it should start as +44.
Tap Save.
1. Go to Settings
2. Messages
3. Turn off iMessage.
4. Go to General
5. Reset
6. Reset Network Settings.
7. Once the iPhone is open.
8. Go to Settings
9. Messages Turn ON iMessage.
10.This will recognize the new sim and have it verified.

Regards,

Gemma M

The iD Mobile Social Media Team

I did all that & nothing helped. 

Finally managed to be ‘escalate to Customer Support’. 

After a few checks, was told to delete my eSIM and they’d send me a new one. 
Thankfully I had my photo ID on me as I had to take selfies & send it to prove who I am. 

New eSIM now appears to work, but will it tomorrow??????

Complaints Dept due to call me to follow this issue up. 

Incredibly frustrating. Even more difficult to get past the useless Bot Support, that’s no help whatsoever. 

Hi ​@LKS123,

Thanks for taking the time to update us.

We're sorry to hear how frustrating this has been, especially with everything you've had to go through to get it resolved.

We're glad to hear the new eSIM is now working, and we hope it continues to do so. It's also good to know that our Complaints team will be following up with you.

Hopefully this has resolved the issue, but if you do need any further assistance, please don't hesitate to get back in touch.

Regards,

Gemma M

The iD Mobile Social Media Team