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The SMT5800 Smartphone from Verizon Wireless hides a handy feature in the on/off button. Located on the upper end of the left edge of the device, the button responds to a slight, gentle press with a menu offering the options to power off, lock the keypad, go to the Comm Port application or immediately adjust the ringer.

This quick-access option means switching your phone to vibrate as you walk into a meeting or cranking the volume all the way up when you're in the stands at a football game doesn't require sifting through assorted settings and menus.

Of course, if all you want to do is turn off your phone, you just give that on/off button a nice firm press and the unit goes off—no menus or selections required.

The SMT5800, based on original design manufacturer HTC's Libra design, is a candy bar-shaped smartphone with numeric keypad on the front and a QWERTY thumb-keyboard that slides out the side. Because the SMT5800 is a Windows Mobile 6 Standard device, it - among other things - doesn't sport a touch screen.

This smartphone goes by a variety of names, depending on who's offering it. There's the HTC 5800 and plain old 5800, for example See here for our review of the Fusion HTC 5800 version of this smartphone, offered by Qwest in Canada.