Learn how to use call duration on your Samsung Galaxy S4 Active.
Press > Call duration. The following times are displayed for Voice and Data:
Last call: shows the length of time for the last call.
Dialed calls: shows the total length of time for all calls made.
Received calls: shows the total length of time for all calls received.
All calls: shows the total length of time for all calls made and received. You may reset these times to zero by pressing Menu key then tapping Reset.