Was sent a new SIM a couple of weeks ago, replaced old SIM and entered unlock code that was on letter with new SIM, didn't accept code. Called Virgin, was told to carry on using old SIM. I have now found that I am not receiving calls. Put new SIM in, message 'enter restriction code'. Tried code from letter again, did not work. Went to simhelp and entered IMEI number and received another code, would not accept code. Rang Virgin help, given another code, again when entered says code error.
Why don't the codes work? What do I need to do.