Lenovo Legion Phone Duel 2 User Manual page 7

: ends the call.
You can also press the volume button to turn the volume up or down.
Note: The Hold function may function differently depending on your carrier.
Use the Call Log
The call log contains entries for missed, outgoing, and received calls. Tap a call log entry to
open the options menu and then tap an option. For example, you can tap the Add contact
option to add the corresponding number to the Contacts list.