Touch and hold any app on the Home Screen until the icons jiggle
Drag the app to a new location
To move the app to another page, drag it to the edge of the screen
Release the app when it is in the desired spot
Tap Done in the top right corner
Press the Home button if your iPhone has one, or swipe up from the bottom to exit jiggle mode
To move multiple apps, drag one app slightly, then tap other apps to add them to the stack and move them together
To reset the Home Screen layout, go to Settings
Tap General
Tap Transfer or Reset iPhone
Tap Reset
Tap Reset Home Screen Layout