Guys there is an e-Mail you can always use, savings@sprintemi.com you cannot make a family plan with Sero, tho check this article out on how to get unlimited mins, it may or may not work.
<Edit by dan-Links to competing sites aren't allowed. Feel free to write exactly how to get a specific plan>
Plus dont forget when getting a new Sprint contract get $25 on each line for your self and another $25 for the person who referred you. All you need to do is call up and give them a phone number of the person who referred you, which can be me as well. Tho it may not work with the Sero, or a business plan.