Sanyo S1 Sprint User Manual page 34

Note: Display indicators help you manage your roaming charges by
letting you know when you're off the Sprint National
Network. (For more information, see Section 2D: Controlling
Your Roaming Experience on page 83.)
18 Section 2A: Phone Basics
indicates the Location feature of your phone is
disabled.
indicates you have a new voice message when Screen
Call is activated.
indicates the Screen Call Auto setting is on.
indicates your phone is in TTY mode.
indicates the alarm clock setting is on.
indicates the speakerphone mode is set to on.
indicates a call is in progress using the Bluetooth
device.
indicates the Car kit device is set to on.
indicates the wired Headset device is set to on.