i bought a used iphone 4s amd it had a bad esn. how can i use it?

[jpraeger888]

How to use an iphone with a bad esn?

 

[WyomingKnott]

Well, you can play games on it and browse with WiFi. But you're almost certainly not going to be able to get phone service on it. Can you find the seller and hit him over the head a few times, or at least get your money back?