About 3 years ago, Palm Inc. released the Treo 680 mobile phone. Many people are still the firmware that came with the phone even though Palm upgraded the software in 2007. Two years later, AT&T decided that all Treo 680 mobile phone users have to upgrade their software. The telecom company has been sending out text messages saying that the 680 users are required to apply the upgrade by September 15 if they want to keep using the phones on their network. What will AT&T do to those that don’t upgrade? I’m sure none of the 680 owners want to find out the hard way.