While I am guessing this to be a mixup ... 'Your payment of $40.00 was received on-time on 01/12/2013. You've made 1 on-time payments. Make 5 more on-time to get $5 off. Your next payment of $40 is due by 02/12/2013. ' Email and text sent to me by Boost. I am on the S2 so $40 should be my lowest shrinkage but this is saying I can get down to $35.