Lenovo A390 Smartphone - Manual (Page 4)

4
Port Assignment and Button Layout
KEY Description
1 HOME KEY
Press to return to the idle
interface
2 MENU KEY
Press to enter the commonly
used, the characteristic and
more menu
3 BACK KEY
Press to return to the superior
menu.
4 VOLUME KEY
Press to increase or decrease
volume.
5
POWER
ON/OFF
Short-click this button to lock
the screen function, long-press
the key to power on/off the
phone.