You need to know the layout of Galaxy S21, S21+ or S21 Ultra to locate and use the buttons, ports, and key components properly.
This Galaxy S21 how-to guide explains everything you need to know on the layout of S21, S21+ or S21 Ultra. The name and function of each button, port, and components are illustrated in the front view and rear view of the three phones.
Why you should know the layout of Galaxy S21, S21+, and S21 Ultra?
You need to know your phone before using it. It is simple.
If you do not know where the SIM card slot is located, you may try hard to pierce the microphone at the bottom of Galaxy S21.
Or if you are seasoned Galaxy S phone user, you may assume the SIM card slot on Galaxy S21 is on the top and therefore, pierce another microphone at the top.
Of course, you need to know the location of the Side key to power on or off Galaxy S21, or the volume key to change the volume when playing media.