This happened at our company. The service was connecting automatically for over a year without any user intervention. Even their software said it was not connected, yet it was. When one of our people went to Mexico, some software on her computer that automatically synchronizes data over the internet transferred a gigabyte of data over the course of 4 days. We got a bill for $22,000. Obviously we asked her about it and she claimed that she never connected to the service because she knew it would cost money. After investigation, we discovered that it was connected even though the software said it wasn't. After numerous talks with AT&T, they finally gave us an ultimatum and said that we either pay their 'reduced' $1,000 or we pay the entire $22,000. We had to choose the $1,000 but we cancelled everything AT&T at our company. That $1,000 cost them a lot of money moving forward.