Kyocera Echo User Manual page 23

Status Bar Icons
The Bluetooth data connection is active.
A voice call is in progress.
Call forwarding is on.
A chat is in progress.
The battery is completely discharged.
The battery is fully charged. (The less blue
showing, the less charge there is remaining.)
The battery is charging.
An error has occurred.
You have missed voice calls.
A download is in progress.
An upload is in progress.
The USB port is connected.
A microSD card has been disconnected
(unmounted) from the device and is now ready for
either removal or formatting.
GPS is active.
Silent mode and Vibrate mode are active.
Status Bar Icons
Airplane mode is active.
Speakerphone is on.
TTY mode is enabled.
You have new voicemail messages.
You have new Text/Multimedia messages.
You have new Email messages.
You have new Gmail™ messages.
You have calendar notifications.
An alarm is set.
Alarm is in snooze mode.
2A. Device Basics 11