What rules do you need to know in order to operate your cell phone in a survival situation?

I found the following in a book and would like to know if they apply?:

If you only have a faint or intermittent cellular signal, try dialing the emergency number as this works at a higher intensity than normal calls. If neither brings response, try turning your phone on and off in an SOS pattern. You might be heard by one of the military or civilian ‘ears in the sky’, which monitor all signals. Short Morse code-like signals are the easiest to separate from other background electronic ‘noise’.

It might take a day or two before your distress message is analyzed, but it could be your pathway to rescue.

The Japanese rescue service urges lost parties to keep cellular phones on or to turn them on as soon as they hear aircraft, as all cellular phones regularly emit unique ‘pings’, or identification patterns. These help the cellular network locate you during the sending and receiving of calls on your number.

Thank you!