A Google search seems to suggest this might be an issue with the Android / Pixel 9 Pro combination, ​@sayeedamin. 

If so, maybe Google will patch Android with a fix.

considering I was on Vodafone without issues and the only thing thats changed is the switch to IDmobile I cant be blamed for assuming its an Issue with IDmobile?

Too make this worse, I had a call from IDmobile (From a mobile number), then got told I need to go through security and give them the verification number sent to my email which states:

”Remember, DO NOT share this code, and we'll never request this number from you over the phone.”

Not a great service so far 

Hi ​@sayeedamin 

We’re sorry to hear this, have you tried any troubleshooting methods? If so, please could you list them to avoid repetition.

Also, please could you confirm the iD Mobile contact number that contacted you?

Anika

Both phones have had full software reset and update.

Number which contacted me was

07914013714

I am afraid that does not look like a number we would use ​@sayeedamin 

Have you completed a manual network reset on the handsets?

Natalie 

Yes manual reset was completed. 

Still an issue

Hey there ​@sayeedamin, what’s the full postcode, or do you have this issue everywhere you go please?

Thanks,

Tyler

Everywhere we go

Sorry to hear that ​@sayeedamin. Would you be happy to try a free replacement SIM card to see if this helps?

Thanks,

Tyler