About the GPS Signal Icon
The
GPS signal icon in the status bar changes color to indicate the signal strength:
Green (partial or full bars)—the device is receiving strong signals, and it is ready for navigation.
Yellow (partial bars)—the device is receiving weak signals, and the position accuracy may be poor.
Red (1 bar)—the device is receiving very weak signals, and your position cannot be determined.
Red slash (no bars)—the device is receiving no signals, or the GPS simulator is enabled.
Receiving GPS Signals