Automated Meter Reading meters and Smart Meters are similar, but they operate using different technologies. AMRs have a SIM within them that transmits data over a mobile network. ‘Smart Metering Equipment Technical Specifications' (SMETS) meters use a communications hub. Smart meters are only being installed in domestic and small businesses. These meters will communicate through a centralised data communication network which will then send the data to the relevant energy supplier, they also have a small digital display device in the domestic home. Smart meters are being rolled out to all homes and small businesses by 2024.