Hi
I ordered one of the sim only tarrif and recived the sim today but now i changed my mind can a cancel it if i dont put in the sim card?

You can, but as you are billed one month in advance, you will still have to pay for a full month's line rental.

You will receive your first bill within the next couple of days.

http://shop.o2.co.uk/FAQ?category=Re...HANGE_MY_PHONE