AT&T Co has lowered its interstate long-distance telephone prices by $637.5m, $98.5m more than the reduction the company proposed last month to the Federal Communications Commission, and the additional cuts are being applied to services used by residential and small-business customers, whose phone bills will fall an average 1.9%: the increased reduction is because the FCC ordered further cuts in access charges since February 15; the downside is that monthly subscriber line charges went up by 30 cents last Friday.