The new 575 area code was added to New Mexico to meet the demand for additional telephone numbers. Starting October 5, 2008, callers MUST use the correct area code (505 or 575) to complete their calls, or a recorded announcement will instruct them to hang up and redial using the appropriate area code. For more information: http://www.nm575.info/
Also, for Verizon Wireless customers it is important that they do an update to their cell phones by dialing *228+send and selecting option 1. For more information go to www.verizonwireless.com/505split
The best way to get through the transition is to be prepared!