Adding a line to family plan without contract
I have getting a new family plan and would like to add my friend's non-contract att as a new line to the family plan. This would hopefully reduce the monthly bills for both of us. But the problem is that he does not want to be on an ATT contract. So my question is :
If I take a family plan with a two year contract and add an existing non-contract ATT connection as a new line, will the existing non-contract ATT also have to enter into a two year contract ?
Thanks in advance