The Ariadna IF3 low voltage phase identifier locates on live networks the link that is present between low voltage customers and the MV/LV transformer and also phase. Many utilities lack good customer connectivity which is very essential data so as to manage distribution networks properly. It is necessary on smart grids to project the updated electric model on GIS so that precise grid calculations can improve the transformer phase-load balance, voltage drop for the subscriber from the transformer, and preventive maintenance and planning etc. Ariadna IF3 will identify the link between LV customers and the MV/LV transformer-phase quickly and reliably so that a quick solution can be found. Massive data gathering campaigns can use a base station with multiple rovers in GIS projects.