I purchased a moto e4 at WalMart. On the back it talks about a subsidy and says, "this phone may only be used with Verizon Prepaid service for 1 year from original activation or until $75 in payments are received." So, does that mean that I have to pay an additional $75 toward the phone at the end of the year? What does it mean until $75 in payments are received ? Doesn't the monthly pre-pay amount count toward the $75?