Windows 10 now allows you set notifications private at the app level. Private notifications will hide the notification from the action center unless the phone is unlocked. However, it will still allow you to see that there is a pending notification. This feature comes handy when you don’t want somebody to pick up your phone[…]
Customize your windows phone’s lock screen notifications to know about the information which matters you the most.
Windows phone allows you to change wallpaper (lock screen background) as you like. You can also extend it to supporting apps like Bing.