Zte MF286D Quick Start Manual page 50

Indicator
SIG
NOTE:
The phone function need support from your network provider.
Buttons
Button
RESET
WLAN
WPS
State
Blue on
Off
Description
Press and hold for about 3 seconds to restore factory
default configurations.
Press to turn off/on the Wi-Fi function.
Press to activate the WPS function.
49
Description
Signal strength level. The signal
strength is from weak to strong.
There is no signal or no SIM card
is inserted.