With the firmware update to Android Lollipop on your Samsung Galaxy S5 much has changed. Not only system processes and apps have been optimized, no, the graphical interface has received a lot of new details and changes. This includes the design on the lock screen or lock screen.
In this you will have noticed with certainty that in the lower left corner a small icon is visible as a red handset. Taking the icon in the center of the screen, then the emergency mode in which, for example, Notrufnummen and own emergency contacts can be called without the Samsung Galaxy S5 must be unlocked appears.
Now you may ask yourself:
Can I remove or hide the red handset on my Samsung Galaxy S5 lock screen?
The answer is: No.
Piped is the one that smartphone manufacturers are obliged to give the possibility to make an emergency call with a blocked phone. This Samsung has implemented on the Samsung Galaxy S5 Android lollipop with red receiver icon on the home screen.
Maybe this will change in a future firmware update again, but one can assume that Samsung contents itself with the red handset icon.