ZTE Corporation ZTEMF636 用户手册
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1.8 LED indications
In the USB Modem there is a multi-colour-LED (light), which
shows the status of the modem via different colours and
flash-signalling. In this table below an explanation is given of all
different situations:
LED indication
USB Modem working status
Orange
Power on:before register the 2G or 3G
network,
network,
Green burning
Register the 2G network
Green blinking
Data transfers in 2G network
Blue burning
Register the 3G network
Blue blinking
Data transfers in 3G network
Red burning
Roaming status
Red blinking
Data transfers in roaming status