I have a blackberry 7730 that displays a sim card error as soon underneath the O2 logo as soon as it is turned on.

I've tried the old sas trick of putting a piece of paper bewtween battery and sim card to hold the card in place but this has been unsucessful.

Any help or advice on this matter will be gleefully accepted.

Anybody got any ideas on this?

02 sent us a new sim card and that still has the same error message

It's possible that the SIM card was provisioned improperly by the carrier or that there's a hardware problem with the SIM slot. I can't think of anything else.

Pull the SIM and clean the contacts off with a pencil eraser. Carefull not to bend the connectors. Replace the sim and you should be fine.

If you still receiving this error w/ a brand new SIM Card then I would definately contact O2 to have them verify the ICCID (SIM Number) and validate that the device needs to be replaced.

Thanks for all your help folks!!