When I do a restart (alt+left shift+del) or battery pull, after it reboots the PRL # is reset to 0. I can do a re-activation (*228 option 2 to update roaming) and it returns to a PRL #40055. I am traveling in Texas from NC and everything works whether I re-activate it or not... what is the effect of the updated PRL or why do they recommend getting the latest PRL