Usually, Amazon.com offers $150 rebate if someone purchases a phone with a one year(or more) service plan. And the corresponding carrier also gives $50 mail in rebate. If I terminate that contract before the end of the term, should I return those rebates? Of course, I know an early termination fee (around $200) will be charged by the carrier If I break the contract. But, what will happen to those rebates? If I have to return those, how much should I pay?