14-16Garmin GTN 725/750 Pilot’s Guide 190-01007-03 Rev. DForewordGettingStartedAudio &Xpdr CtrlCom/NavFPLDirect-ToProcChartsWpt InfoMapTrafflcTerrainWeatherNearestServices/MusicUtilitiesSystemMessagesSymbolsAppendixIndex14.4.5 Phone VolumeUse the Phone Volume controls to adjust the loudness of the phone callsyou hear. Volume controls will only be available when the Idle, Connected, orChanging Volume states are displayed.Adjusting the Phone Volume with the Soft Keys1. While viewing the Iridium Phone page, touch the VOL keys toadjust the phone volume.Touch ToReduce VolumePhone VolumeLevel Bar GraphTouch ToIncrease VolumeFigure 14-20 Select Soft Keys for Phone Volume Adjustment2. The phone volume level is shown as a bar graph.14.4.6 SMS Text OperationSend and receive text messages through the GSR 56 phone connection.1. While viewing the Services page, touch the SMS Text key.Touch To ComposeNew MessageTouch To ViewSMS Text MenuTouch To ReceivedMessagesTouch To ViewDraft MessagesTouch To ViewSent MessagesTouch To ReturnTo Previous PageFigure 14-21 SMS Text Page2. Select Compose, Inbox, Drafts, or Outbox.