Switching to Sprint and buying iPhones?

My dad and I are going to switch to Sprint this weekend but we just had a few questions. His credit isn't too hot, so will he have to pay a deposit? Also, we were going to get the iPhones that are 0.00 when starting a new plan. This might sound dumb, but will they still be that price even though his credit isn't great? And finally. I've read things such as "spending limits." What does that mean?

If one has low to no credit, there will most likely be a deposit involved. Credit does not impact the contract price of a phone. The spending limits relate to how much they will allow the account to go delinquent for before they shut off the phone.

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