I ran into a problem when trying to input data to mySOS - turns out if you download it from play store (android) it is an old version and has all sorts of info about quarantine - when I finally found a more current version (had to find it froma QR online) it actually worked - but set aside a good half hour or more - it's tedious and lots of steps, info input, has to verify before you can go to next step, etc.
Also it will not be used for entry after Nov. 14 - there's a website that will be used then - there is a popup on the app that says so as well as info online.