Get the current signal quality. Signal quality (percent). Get the Electronic Serial Number of the card. The ESN. Get the Service System details of the current network, if registered. A structure containing the Band Class (0 = unknown, 1 = 800 MHz, 2 = 1900 MHz), the Band ("A" - "F" as defined by IS707-A), and the System ID of the serving network. The signal quality changed. The new quality in percent, 0..100. Get device registration state. CDMA 1x registration state. EVDO registration state. The device registration state changed. CDMA 1x registration state. EVDO registration state. Registration status is unknown or the device is not registered. Registered, but roaming status is unknown or cannot be provided by the device. The device may or may not be roaming. Currently registered on the home network. Currently registered on a roaming network.