I've thought about trying this, but I don't have the technical know-how and even then, would be worried that it wouldn't work and I wouldn't get to say my goodbyes. My plan instead is to have all my goodbyes typed out in advance in text docs, then hurriedly copy/pasting them all with location data disabled when I'm out somewhere remote right before I try to ctb, sometime in the middle of the night when most will be asleep and won't see it until hours later.