Excuse me? Clearly you didn't understand my post. Perhaps you should read it again. I'm saying that it is improbable that you should find yourself in a situation where you could signal via laser but not by phone/radio; meaning if you don't have a working phone or radio for whatever reason your laser won't be much good either (relative to conventional alternatives such as heliograph or whistle - which are waterproof and don't rely on battery)
This implies that I always have a phone or radio. Currently not much comes before my personal safety thank you!
In fact I find it absurd that you seem to believe you could find yourself in a situation with a working laser but not a working phone... What could you possibly be doing?!
A "working phone" doesn't equal a "useful phone." Loads of places out of range of a cell tower. Particularly as not all carriers share the same towers. Mine (Verizon) has signal where Barbara's doesn't Not sure who her carrier is, but it's not Verizon) and hers has signal where mine doesn't. That's only useful if we're always together so one of us has signal; even then, there are still loads of areas where we both get NO signal. And my radio is only useful f somebody's monitoring the right frequency (also with dead spots in the canyons)