I have a nokia 5165 phone right now and I just bought a brand new nokia 7210 phone off of ebay. It is unlocked. Can i take the SIM card from my 5165 phone and insert it into my nokia 7210 phone?? If I do so will the 7210 have the same number and everything as the phone that the SIM is from. Is the SIM card under the gray sticker when you take the battery off. How do I get to the card?