It’s also possible that there’s a hardware failure that is making the power button erroneously report button presses, leading to the Emergency SOS. This happened to me on a Pixel 3, which resulted in repeated calls to 911 with no user input.

* Can’t power it off for the night, because the flaky power button turns it back on.

* Can’t pull the SIM card, because emergency calls don’t require a SIM card to connect.

* Can’t consistently use the “slide to cancel” option, as the phone was also trying to initialize the camera at the same time. (IIRC, 3 button presses for the camera, 5 button presses for SOS. The flaky power button managed to trigger SOS while the camera was still initializing the GUI, so the camera GUI took focus.)

* Can’t access the settings, because the flaky power button either turns the phone off, opens the camera, or sends an SOS faster than I could search the settings.

This all started at about 10 PM. So, instead of going to sleep, I needed to spend the next two hours baby-sitting my phone as it mostly was repeatedly rebooting, with occasional calls to 911, until the battery finally died.