Besides the reliability of AM THe internet network and the mobile phone network has many parts. A breakdown in any of these parts would disrupt/break communica

Besides the reliability of AM THe internet network and the mobile phone network has many parts. A breakdown in any of these parts would disrupt/break communications A mobile phone cell (depending on technology) is often only a small size or diameter. A mobile phone base station is reliant on the electricity supply. If the wired electricity supply is down ( during an emergency) the mobile phone base state MAY have batteries that will run it for a while. Where for a while would be measured in hours. During emergencies such as flood or fire such base stations maybe out for many days. Broadcast band AM radio signals , normally 500KHz to 1.6MHz can have a reliable transmission range for typical broadcast transmitter normally several KW power ) of RELIABLE 100 miles during the DAY. AM radio range during night can be 1000s KM. The mobile network is prone to failure during emergencies and is hard to make robust. Opposition to AM network usage for emergencies would be from entities that want a small cost reduction in car manufacture.