I have a Nokia E61 supplied by Vodafone and it appears to be locked so i cannot use any sim card but Vodafone. I want to use this on O2 as the coverage is much better. Obviously i am here because i want to make the free calls but need the phone unlocked first. Any ideas?

Thanks

As far as i know you will have to contact Vodafone for an unlock code, they will probably charge you about £30. I don't think there is any other way you can unlock it.