Usb Modem Indicator Lights Explained - BT ZTE MF636 User Manual

USB Modem indicator lights explained

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