I am looking to purchase an iphone off of ebay, craigslist, or from a friend, and I want to use it on the Straight Talk plan. I understand that I have to order a sim card from the ST website, but I'm confused if I have to get a phone that is unlocked or not… Can I buy a phone that isn't unlocked and still make it work? If someone could help with this, that would be awesome!
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