do you pay the amount for the phone today?

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Whiz Kid

do you pay the amount for the phone today?

Hi, I have an iPhone that's services with sprint and I receive my update in october but I want my own plan and I like the deal you guys have. My question is do you pay the amount for the phone today because I was seeing the prices and it said 735 due today and I don't have that amount right now and also would I have to cancel my sprint services and take care of the charges?