I hope the previous message is posted in the correct forum. I assume it is since it implicates not one, but two separate frequent flier programs (American AAdvantage and Northwest WorldPerks) and two telephone providers (AT&T and Sprint). If somebody with more technical knowledge that I wants to cross-post this message (or provide a link) in another relevant forum (especially Northwest and American; perhaps also AT&T, Sprint, and S.P.A.M.), you have my permission and encouragement. Hopefully, nobody else suffers this problem.