So true bro...i was requesting for such feature since I purchased my S23U. They never cared about it, If any app is Consuming the data in background, it will directly be reflected in the status bar Network meter, it is such a useful feature, yet Oneui is doesn't have it.
Yp ....samsung has went so far telling us which app caused to vibrate the phone ....don't know y they r not implementing this simple fearure ,atleast they should bring it in Goodlock
