Sprint

Hello. I have a sprint question hopefully someone can answer. I got a sprint plan back in sept 2016 . 2 phones on the plan . i paid it for probably 3 or 4months then stopped cause it got too expensive and service sucks. I have 2 S7 i cant use because i have to pay them. I cant pay it all at once but im wondering can i pay off 1 phone now then the other later? I miss my s7 and the phone i have now sucks. Not sure if sprint will let me pay off 1 phone only. . do any of you know? Thanks! Id do payments but i need the s7 now.