So i went to France a couple of months ago and got my hands on a prepaid Nokia 2220 and I really liked the phone. After leaving France, I travelled to Mexico and unlocked the phone but the phone did not work. I was told by the person whom unlocked the phone that it had something to do with the GSM frequencies not being compatible. I have travelled to other countries and have had the same issue. Even in the states I put in my T-Mobile sim and get no signal. Is there anything I can do to make this phone work outside of France?