FP4 - not working on iD mobile network in UK

New FP4 not working on iD mobile network in UK ( part of the ‘3’ company).
After an hour of live chat they tell me the phone is not compatible with their network.
Phone stopped making and receiving calls two days ago !
Any advice ( yes, I know - leave them !)
Thanks

Did you test the SIM at all in another phone? Maybe it’s went wonky. I’m on EE in the UK, bought my FP4 from EE directly in 2022 and it’s been very reliable. My sister is on O2 and bought an FP4 in May 2024, so there’s no way the FP4 is not compatible with UK networks.

In settings there’s an option under the Network Settings to toggle the SIM off. I’ve never noticed this before, would it be set to ‘off’?

Thanks for the replies.
Easy decision - I’m leaving iDMobile today.

Thanks.
I’ve left iDMobile - thankfully it was a month to month contract.
They and ‘3’ network are definitely ones to avoid.