I cancelled my contract with Orange early, based on the changes to their pricing, which is great since I got out of an 18 month contract after 4 months and got a 'free' phone.
I've now signed up with O2 and want to use the Nokia 5800 handset I got from Orange with the 02 contract, but when I put the SIM in the phone it just says 'sim card not valid' which I assume means the phone is locked.
I've found a few sites where you can get unlock codes based on your IMEI code but I've not seen any offering anything for the 5800. Is it right that I can get the code from Orange themselves? It's been ages since I've had to unlock a phone so I'm a bit out of the loop!
Any help appreciated, thanks