A widely used panic alarm handed out to at least 10,000 thousand elderly people in the UK can be remotely controlled by sending simple SMS commands. The alarm is a small plastic pendant device with an SOS button in the middle. It connects to 2G/GPRS cellular networks, which means it can be used anywhere without the need for an intermediary base station and provides a live status feed. As well as being able to locate the wearer via GPS, it can also detect whether the wearer has taken a fall.”]
Source: https://nakedsecurity.sophos.com/2019/05/14/white-label-sos-panic-buttons-can-be-hacked-via-sms/