can but first you must change your avatar 

Which phone?

From a Home screen, swipe up from the center of the display to access the apps screen.

Note These instructions only apply to Standard mode and the default Home screen layout.

Navigate: Settings Settings icon > Connections > Data usage.

From the Mobile section, tap Mobile data usage.

Select an app (below the usage graph) then view the usage.
Note To restrict the app from using data in the background, tap the Allow background data usage switch to turn off Switch off.