If your device is not running Windows 8, refer to Windows 10 for further instructions.
From the right edge of the screen, swipe left to display the charms menu.
If using a mouse, move the pointer to the upper or lower-right corner of the Start screen then move up/down.
Alternatively, press the Windows+C keys ( +C) located on the physical keyboard (if available).
View the Network Signal Strength Indicator (signal bars) located in the lower-left.