Hi phoopt
Let me firstly welcome you the the Vodafone eForum family. We like to see new faces here.
I would guess that your SIM is deactivated. I take it you have a PAYG dongle?
If so this would of been deactivated, as per
terms and conditions section 6, if it had not been used for a 12 month period.
If it's a contract SIM that you are still paying for, you will need to speak to
customer services to look into this.
Let me know how you get on.
Regards
Trev
eForum Team