What does a unlocked cell phone mean?
a locked cell phone is locked to one specific provider where as an unlocked one is open to all or most providers all you need is a sim card. to get a phone unlocked, go into the provider it is locked to and you may need to pay a bit of money.
No contract, take it to any provider and get it set up.
Cell phone that ain't locked
Another way of saying "jail-broken".