Unlock 3310 - Vodafone UK

[contemptx]

I have a nokia 3310 and would like to use a Vodafone ( UK ) sim card.

I have tryed using the generator and i get the following:

Sim Was Not Restricted. - which to me sounds like it is already unlocked.

BUT when i try and use the simcard i get the following:

Sim Card Not Accepted.

If anyone could help me on this i would be very greatful.

IMEI: <removed>
Network: Unknown

I also have another 3310 that accepts the simcard but asks me for:

Security Code: ? i have tryed 12345 but this is incorrect.

Is there a way to reset the phone using a code or do i have to use a data cable?
If its a data cable anyone know a good place to get one and what sort to get - UK

Thankyou In Advance.