My sim is an esim, so I cant just swap it out, I hate these esims, stupid idea to be honest, Im sure they are great and fix some security thing, but they are not convenient.
Fix: Okay, there was an update pushed out over the Alpha channel, this fixed the problem straight away, previous update was 2 days ago, I assume this one caused the issue as I haven't used my phone since the weekend, it has just sat there charging.
My phone was on the Alpha update channel due to the Bluetooth issues we had been experiencing with multiple devices not connecting, and I left it like that, so I have now switched it to the Stable channel, which is where it will stay until the next issue.....