Press to launch Settings from the Springboard.
Press to select Wallpaper from the Settings Menu.
Tap the wallpaper preview button to continue
Tap to open your Camera Roll or Wallpaper folder
Select an image you'd like to make a wallpaper
You'll now be given the ability to move and scale the image to your liking. Press the Set button when you're happy with the positioning.
Press to choose whether you'd like the image set as the wallpaper for your homescreen, lockscreen, or both.
Press the Home button to view your newly set wallpaper.
***We are aware that this tutorial is basic for many users. Please note that this tutorial is for beginners who may not know how to use the iPhone as well as you***