Trying to connect my iPhone 5?

So, some lady ripped me off by selling me her iphone but I guess she owes money on it or something because when I tried connecting it sprint said that I couldn't because the phone is still on someone else's plan but is diconnected. Is there any way I can connect it by maybe unlocking it? Or getting a new simcard? Or i don't know I'm in desperate need of help! Can anyone please help me I would greatly appreciate it.

Hi it seems that the phone has bad ESN. There's a service for cleaning that, but it costs more than a hundred bucks. I suggest you selling the phone or try to use it with a compatible SIM-card adapter, but this might not fix the issue, so rather sell the phone or search for an ESN cleaning service.

Comment on this reply if you have further questions.

Yeah, it sounds like her service was disconnected for financial reasons (as in, she didn't pay her bill). So her service is disconnected, but that phone is still tied to her account, and she will have to pay her phone bill before you can activate the phone. I would go back to her and demand a refund, don't be afraid to get the police involved.