Check out my latest video tutorial in Youtube about the perfect workflow with Lightrrom to apply to your photos. Tutorial is in Spanish but you can turn on the english subtitles :)



The SIM stores network state information, which is received from the Location Area Identity (LAI). Operator networks are divided into Location Areas, each having a unique LAI number. When the device changes locations, it stores the new LAI to the SIM and sends it back to the operator network with its new location. If the device is power cycled, it will take data off the SIM, and search for the prior LAI.