When we renewed our contract last month, my wife upgraded to the Centro. But I wanted to make sure we'd get the full discount and keep our existing 700min fair and flexible plan (w/ unlimited Vision and grandfathered unlimited SMS from back in the day), since the closest plan in their existing list is twice as much money for 1500 min that we won't use. After talking to the rep about it, he approved the contract renewal of our existing plan with the full discount.
Anyway, I sent in the rebate for my wife's phone even though we renewed what is currently a non-existent plan, and when I checked it this morning it's been approved and should be mailing out soon.
