Iphone 4S and Straight talk?

I just bought an Iphone 4S on ebay that stated it could be used for AT&T, *Straight Talk*, and various other comapnies. I just got the phone. How do I even go about getting it turned on so that I can start using it, because with my old cellphone I just bought the card needed from wal-mart and put the code in. I don't understand what to do with this Iphone, in order to use straight talk.

I've read a lot about this lately and I can help. First, the phone needs to be unlocked, otherwise it is locked into a specific carrier (AT&T). There are many website that offer this service online, either by emailing you an unlock code (my preference) or by mailing in your phone and having them unlock it (always makes me nervous). There are even website and youtube videos online that sometimes give you the codes and instructions for free.
Next, you will need to get a Straight Talk sim card. You can buy them from a retailer such a Wal-mart or from the Straight Talk website for $6.99 + free S&H but my suggestion is to buy it off of eBay from a powerseller. They go for about $6.99 + free S&H.
The thing about using your own phone with Straight Talk (or Net10 for that matter) is you have to use the BYOP (bring your own phone) option which is automatically a $45 unlimited monthly plan. If this works for you, follow all the instructions and you should have a usable phone in no time! You can always call their customer service if you need further help or ask the representative in the store.
Hope this helps.

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