[Try619]

I just upgraded to the new Sprint Rom this is the first time I have tried any type of flashing of any kind. I've been seriously thinking about flashing to a custom rom, I do realize that I first need to unlock my phone before I do anything. My question is while I installed this rom during the tri-colored screen at the top of the screen I noticed that it said unlocked, does this mean my phone is already unlocked? This is a replacment phone and probably a refurb so is it possible that the previous already unlocked it. Thanks in advance for any help.