On November 24th a new law goes into effect in the United States allowing customers to keep their cell phone number when switching service providers. In my opinion this will spark drastic changes in the way cell phone plans are detailed. For example, in an effort to keep customers from switching, T-Mobile will be promoting "Three Day Weekends" including Fridays in their unlimited night and weekend calling. This idea of number portability may have a downside. The idea of being able to take your number if you leave may force providers to offer only two-year contracts for premier services in an effort to keep customers around longer. More at CNN.com