I called AT&T this afternoon to add HBO. After the high-pressure salesperson disguised as a customer service rep sold me on 3 months of free HBO, he matter-of-factly mentioned AT&T required a credit card on file to effect the change. After having my credit card number stolen several times by unscrupulous call center people from various companies, I no longer give out my credit card over the phone. It's safer to use it on-line. There are way too many people working for call centers who steal credit card info and sell it to identity... read full review »