Can't connect to network - SIM suddenly stopped working

[#1]

Hi

I was connected to the Plusnet network this morning, managed to make calls etc. A few hours later and I noticed my phone was no longer connected. 

It's been several hours now and still nothing. I've tried my SIM card in another phone and it still doesn't work. I tried 'forcing' it onto the network as suggested by others in this forum but it says that the Plusnet network is 'forbidden'.

I need to receive a verification code via text to access an online account ASAP for work. How can I fix my network issues pronto?

Thanks

Emily 

[#2]

Sorry to hear the issues you've had with the network @embridge I will message you via PM to sort this out.

[#3]

My sim stopped working yesterday - out of the blue a notification appreared on my phone telling me ‘no available sim.
I am away from home in France, will be driving alone back to UK in 10 days so a working phone is even more crucial than usual.
I urgently need help to rectify this.
Thank you

[#4]

Hi there, that tends to indicate a hardware rather than a network problem. In other words if there was no signal your phone should still detect the SIM for you. 

The best thing to do if you haven't already is to power your phone off, remove and re-enter the SIM card. 

Let us know how you get on.