AT&T MicroCell User Manual page 19

Status Indicator Light is
Flashing Green
Network
Flashing Red
Then...
The MicroCell may be activating or downloading
new software.
During the activation process, it can take up
to 90 minutes for your MicroCell to complete
activation.
If the light is still flashing after 90 minutes, refer
to Step 5 on page 13.
There may be a problem with your device.
Contact AT&T Support at 1-800-331-0500
for assistance.
19