The app Called Personal light is aimed at users of company SIMs or the Public Administration (Consip agreement), in order to manage personal telephone calls (with prefix), and work calls (without prefix). It is possible to use the 4146 prefix for the TIM operator, the 416 prefix for the H3G operator (Tre), the 77 prefix for the Vodafone operator, or another prefix. The app reads all the phone numbers in the smartphone's address book and creates the two lists of Contacts and Favorites. By clickin