Thanks for the reply B. Diddy. I bought the phone online from a business (not EBAY). Yes the SIM card came from StraightTalk but I still needed to configure the card. figured out how by going online to StraightTalk for instructrions. Thanks again for your reply.
My carrier is Straight talk and I can make calls, I can also text so I suppose I am accessing the Straight talk network. My phone has a sim card which hasme thinking it was made for AT&T but I don't actually know that..