Service provider is Tesco. I've tried another sim and it tells me "phone restricted". I'd previously tried two unlock codes from an online generator. The one you've given me makes 3.
“Can Not Undo Restriction” or “Not allowed” means. After you have made 5 attempts or even 3 attempts on newer phones and failed, the phone displays that message, meaning that the phone is "hard locked." At this point, you will still be able to use phone with the original provider, but you will not be able to unlock it by codes. Get your phone unlocked at a local market or small independent mobile shop, they will use expensive hardware to unlock, for a small fee round about £10
I am also looking for a netwok unlock code for Nokia 6070 from Tesco. It was bought in Ireland IMEI: 359536017065251 What do I need to do?