When hiking I have never yet had phone for help, but there is always the possibility of a first time.
Apart from a direct mobile call to a loved one, using a whistle, etc what the other options?
One reason I ask is that I've been reading about a free app called Zello which a newspaper article claimed was used extensively in the Houston hurricane to help people get to safety.
Has anyone used Zello, is it useful, possibly or not.
I've downloaded it but (due to my age I think?) I just cannot seem to get a grasp on how it might work. Or, is it simple and I cannot see the obvious?