“Life companion” is the slogan that displays on Samsung Galaxy S4 screen. Now if you are tired with this tag line then no need to worry as Samsung gives option to change this text, color, font and size.
Change Samsung Galaxy S4 Lock Screen Message
Go to “Settings” > “My device” > “Lock screen”
Touch “Lock screen widgets”
Touch “Clock or personal message” to customize lock screen message
On lock screen, tap and hold the text line “Life companion”, and drag it down.
Edit icon will appear, so proceed for customization to do changes in Samsung Galaxy S4 lock screen message.
If you want to remove date, time and slogan widget from Galaxy S4 screen completely then touch, hold and drag it up to remove.