Get lost in a desert??

I would scream loudly so that people can hear me and would also try to reach the nearest zone city, if no one hears me i know is the end of my life but with no food and water I surely die. If I were in a dessert I won´t go alone because it is nearly lethal you always have to be with a guide, so that you don´t get lost. Have a nice day ! Martín !