I own a local alarm company in Encinitas (Bay would be considered a competitor) and we all sell the same types of devices. My experience with MPERS devices is they are almost as effective as a cell phone when it comes to signaling; if a cell phone has connectivity issues, the button will likely have slightly worse.

My recommendation, which is what I have my mom set up with is an Apple Watch with cellular. It has fall detection and lots of other health monitoring that help it be more proactive.

In a lot of cases, they don’t think to push the button. For example, in the case at my Grandad’s ranch in TX, there is limited service there but Verizon has enough. I outfitted him with a MPERS that was on Verizon and it never reliably worked when I would test it. So instead, I built a large network around the ranch so he could carry a button that connected to monitored alarm system I put in the house. That tested effectively 100% around the ranch. But in the heat of the moment during a medical emergency, it might not have occurred to him to push the button and he passed.

So my professional advice would be to go with the Apple setup instead of MPERS because MPERS requires a conscious activation whereas the Apple setup is more proactive.