My smart phone has emergency dialing as well as an emergency information screen that anyone can see, they do not need a pass code to see.

Emergency responders are being trained to look for this emergency information on smart phones.

In this area you can give information stating that you have MG, do not make me lie down, use resuscitation bag to assist breathing until hospital, your doctors name, medications, emergency contact person, etc.

if all you can do is seek this screen on your phone and hand it to someone, it will assist you to get the proper help. Also if family members know you have this detailed information on your phone (who doesn't have their phone on them these days), then they can make sure emergency responders read the screen.

I hope this is helpful information for you.