Indicator Led - Huawei E3272 Quick Start Manual

 Indicator (LED)
It indicates the status of the USB-Modem.
Green, blinking twice every 2s: The USB-Modem is powered on.

Green, blinking once every 0.2s: The software of the USB-Modem is being

upgraded.
Green, blinking once every 2s: The USB-Modem is registering with a 2G network.

Cyan, blinking once every 2s: The USB-Modem is registering with a 3G/3G+

network.