Viewing the display screen, Means your phone cannot find a signal, Indicates the call is on hold – Sanyo scp 7500 User Manual

Page 13: Indicates a call is in progress, Indicates 1x service is available, Indicates 1x service is not available, Indicates 1x data/10-4 access is active, Indicates evdo service is available, Indicates evdo service is dormant, Indicates your access to a secure site