Currently I have four iPhones on a device repayment on my account, and I'm getting a $25 device repayment off of the $40 a month for service, which makes the service $15 a month on the More Everthing plan. I have a data allotment of 15gb for $90 a month. How big of a data plan do I need to maintain to keep the $25/mo per line device repayment discount? Or does the size of the data plan affect that discount at all?