Help picking a provider for iphone 4 cheapest one?

Okay so my friend gave me her iPhone 4 but it was connected to sprint so I'm wondering if I do connect it to sprint how much am I gonna pay? Can I change the company? If I can change the company wich is the cheapest one? Could I put this iPhone for virgin mobile?

Sprint is CDMA so you can't change the company. Only GSM phones that use sim cards such as AT&T and TMobile can be interchanged. Sprint is probably the cheapest for an individual plan anyway though since it only costs about $80 per month for unlimited EVERYTHING on the iPhone

You can connect it to straight talk i believe if i'm not mistaken

You can't link it with Virgin Mobile. They make it so that if you want an iPhone with their company you have to actually buy THEIR iPhone.

StraightTalk is what I would recommend if you want cheap plan yet good coverage and service. Virgin is cheaper but their coverage and service are not that good.

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