How much does an iPhone cost to get with boost mobile, and can I get gen 4 or gen 5?

How much does an iPhone cost to get with boost mobile, and can I get gen 4 or gen 5?

Not sure about boost, but you can go to t-mobile and get it for like 579.00 which is way cheaper than anywhere. Then you can get service from where I get it because I get unlimited talk text and data for only 49 a month, cheaper than you can get it with t-mobile, even though its on t's 4g network and you don't have to sign a contract or anything like that