Zte Altair - Adjusting the Volume; Using Call History

14 PHONE CALLS
Goto:
Display the Contacts, Call Log, Messaging, Browser, or Main menu during
a call.
DTMF off: Enable or disable DTMF tones (touch-tone sounds).
End Call: Disconnect the current call.
Adjusting the volume
During a call, press the Volume keys to adjust the earpiece or speaker
volume.
Using call history
From the home screen, press the Send key to check the All Calls log for a list
of recent calls.