OK I'm a noob about phone stuff and live in the USA. I have a plain old prepaid T Mobile phone because I only use like $50 worth of minutes each year. I've read about getting a G1 and using a prepaid SIM in it. How to activate a T-Mobile G1 from home – no contract required | Android Community I'm not on the phone much but like the idea of a G1 with the WiFi turned on for web access but wont use enough to justify a data plan. Do I need a new G1 or can I buy a used one off EBay? What should I expect to pay for a new or used one? Does it need to be unlocked and why? Any other info I need to do this? Any advise would be appreciated.