AT&T Corp has added a greater discount to its AT&T True USA Savings programme for customers with $75 or more a month in long distance calling: the new discount is 30% for calls to anyone within the US; subscribers spending $10 to $24.99 a month on long-distance calls receive a 10% discount on their domestic long distance bills, and a 20% discount applies to long-distance bills between $25 and $74.99.