im not 100% sure
but normally you get a credit PER PHONE , or PER LINE. unless at&T has a scam to save cash lol
if your on a family plan it might give them reason to only give you one credit , but Idunno, that doesn't sound right to me.
id give AT&T's CS(customer service ) a call.
I remember reading that their account for credited $500. So yes its per phone, buy as se1f has pointed out, might have something to do with family lines.
