ZTE MF920A - Manual (Page 6)

6
LED INDICATORS
On, battery is low (<23%).
Flashing, battery is discharged, (< 12 %).
On, battery is OK (>23 %).
Flashing, battery is charging.
Solid, Wi-Fi is On.
Flashing, WPS is enabled, available for 2 minutes.
Not registered on the network.
No SIM, invalid SIM, PIN or PUK locked.
On, device is registered on 2G/3G,
Flashing, device is connected to 2G/3G.
Device is registered on 4G
Flashing, device is connected to 4G