Multi-User Mode (Guest Mode) With Simple Build.Prop Edit

Enable multi-user feature on your Android one phone (running Android 5.1 Lollipop) without flashing .zip through custom recovery. All you need is root access. 

Instructions

Just go to /system , edit your "build.prop" file and add the following lines:

fw.max_users=3

fw.show_multiuserui=1

Save and reboot your phone. Done! Tested On Samsung J5