3G turning off beginning next week. Could affect burglar alarms, medical alerts, onstar, school bus tracking, emergency calls from now obsolete phones and PRISONER ANKLE SURVEILLANCE. “It remains to be seen how law enforcement will contend with a system no longer capable of monitoring the whereabouts of child abusers, sex offenders and drunk drivers.”

https://cyberguy.com/tech-tips-tricks/millions-of-3g-devices-are-about-to-stop-working/