My sister has given my daughter her old mobile phone, it is a samsung E900 on the o2 network. I had a old o2 sim card that I have not used and I have put it into the phone, now the phone does not seem to be working, Its not letting me register the card by phoning the helpline, I also tryed to register on line put it is just coming up as The mobile number you have entered is not showing as active on our database, it is also not taking calls, and keeps on saying limited service or emergency calls only.
please help will I need to get the phone unlocked or maybe it only recognises my sisters simcard as the phone was on a contract.
also how much does it cost to get it unlocked?