On an adjacent theme there has been a large debate in Sweden if a car that has mandated automatic eCall over 2G or 3G is faulty and thus not roadworthy if the 2G and 3G networks are turned off. The eCall feature was introduced broadly in 2018. It still uses modem sounds over a voice phone call to relay car emergency status and position. New solutions for packet only networks (4g and 5G) have been standardised but are not retrofitted to older cars.