Your iD contract continues until you cancel or leave for another service provider, @Claresmobike. 

You will be charged up to the point-in-time you’re disconnected from the iD network.

Thank you. Fingers crossed the final bill is correct  

You never know, your account might be in credit when it’s closed, @Claresmobike.

Hi @Claresmobike 

You’ll be charged at the same rate after a contract unless the account holder makes a change, such as upgrading to a SIM only option or upgrading to another device plan.

Tom