Hi James Veal,
Thank you for posting in Microsoft Community.
To find the phone number associated with the SIM card on your Surface Pro 8 with Windows 11, you can follow these steps:
- Click on the Start button and select the Settings icon.
- Click on Network & Internet.
- Select Cellular on the left-hand side.
- Under the Cellular section, you should see the phone number associated with the SIM card listed.
- Click on View my account.
If still persist, we need to consult to our live support in Business team to further isolate and fix the issue. Follow the steps below.
- Go to this link: https://serviceshub.microsoft.com/home
- signing your account then click on request support.
- Next select the Product and specify the issue.
- Select type of support, your time zone and preferred contact method.
- Describe your issue as detailed as possible.
- If applicable share picture, videos, or files to provide you with the most appropriate support.
- Provide your contact information.
- Verify the details of the new Microsoft support request.
- Then click on Submit and a Microsoft support Enterprise support agent will be getting in contact with you as soon as possible.
Other option is to click this link. Contact Surface Support for Business and Education customers - Surface | Microsoft Learn
Thank you for your understanding. Please stay healthy and take good care always in these trying times.
Kind regards,
Christopher.