Viewing the display screen, Means your phone cannot find a signal, Indicates a call is on hold – Sanyo SCP-2300 User Manual

Page 10: Tells you a call is in progress, Indicates 1x services/10-4 access are active, Indicates you have new text messages waiting, Indicates your phone is on analog service network, Indicates the 10-4 service is enabled, Indicates the 10-4 service is unavailable, Indicates a beep sound is set at level 1