Do you want to view overall talking time on your Android phone? To check total call time on HTC One (used Incoming and outgoing minutes) in a period of time, do as follows:
1. Open "Settings" app
2. To go to Wireless & Network settings, tap "More"
3. Tap "Usage"
4. Swipe right to enter "Minutes" tab
5. There you should see the minuted (seconds) for both incoming and outgoing calls
6. You may change the time interval to see the talking time at a specific period