My grandmother has been sent a new SIM from Virgin Media. I have tried inserting it into her phone, however it is coming up with the message ‘SIM not valid’. It does not ask for an unlocking code or anything else. Her phone is a NOKIA 2310. I have compared the previous SIM and new one and the metallic section on the back of the SIMs are different shapes (old SIM is more circular) which makes me think it isn’t compatible. I have also seen other posts which relate to NOKIA phones and new SIMs not working.
What can Virgin Media do to resolve this issue for my 89 year old grandmother please?
I had the same problem today with my Nokia 2310. Your fix, Enlli, solved it - using the 15 digit unlock code on the letter sent with the new SIM and +7# as the terminator. It took a few a attempts as if you hesitate while typing it times out. The new SIM now works OK. Thank you so much for your help, enlli - and shame on Virgin for complete absence of info and means of contact.