Hello, first post.. Just received my replacement iphone 5 from apple due to a faulty button. I'm on verizon and just got the replacement in the mail from apple, not verizon, but havn't put my sim card in or turned it on yet. I've looked everywhere but can't find out if this replacement is "locked" (whatever that means) or if i can go to wal mart and use this phone to get on straight talk and cut my monthly bill in half. For the time being, im using my old phone. Thanks in advance as no one at wal mart knows anything 
