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USB Modem indicator lights explained
Indicator is… this means…
Green
the USB Modem is connected to a GPRS
(GSM/GPRS/EDGE) network
Blue
the USB Modem is connected to a UMTS (3G) or HSPA
(HSDPA/HSUPA) network
Red
the USB modem could not connect to a network
Off
the USB Modem is removed and not connected
Your USB Modem