Assuming that you’re still capable of verbal comms. The good thing about a PLB is that it’s generally a fairly definitive signal that something is wrong at a specific location. It also requires less dexterity to trigger and potentially has a bit higher signal to noise than accidental emergency calls.

Source: Australian with a PLB that I take offshore sailing and bushwalking. Also have a 2yo who is impressively adept at getting a locked phone to enter emergency call mode.