phone icon dissappeared

[Galaxy III Phone]

I tried to follow the directions by accessing the blue tile with four white squares to reset the icon but can't locatre a blue tile either. Help!

 

[Rukbat]

Long-press a blank spot on the home screen. Select Apps (or Applications). Select Phone. It'll be on your home screen. Move it down to where it was if you want it there (by long-pressing it, then moving it).