I had to call to cancel my AT&T account recently. The conversation was pretty short: I just told the rep that I was moving in with a roommate that already had service set up so I didn't need to transfer my own service (only about ~20% a lie).

The frustrating and insulting part was that I spent a really long time on hold before I was connected with the rep and every few minutes while I was on hold an automated message played saying something along the lines of "You can pay your bill, start new service, or basically anything except cancel way faster by going online!" It was bad enough without the constant reminders that I was only sitting there on hold because I wanted the one thing AT&T won't let you do online.