BARCELONA, Spain--Samsung usually arrives at a trade show with all guns blazing and Mobile World Congress was no exception. Not only did the company show off its new Galaxy Tab 10.1 and Galaxy S II, but also it displayed some handsets it had announced previously. And these devices came in all sizes.

On the larger side is the Samsung Galaxy S 4G, which T-Mobile and Sammy revealed last month. With a 4-inch Super AMOLED touch screen and a slim rectangular shape, it looks very much like the earlier Samsung Vibrant. It certainly was pretty, but it felt rather fragile. Features on the Galaxy S 4G include a 5-megapixel camera, a second front-facing camera, a 1GHz Cortex A8 Hummingbird processor, and support for T-Mobile's 4G network.

We also got our first peek at the Samsung Ace, Gio, Fit, and Mini, which were also announced last month. These Android devices represent the small camp. With displays ranging from 3.1 to 3.5 inches, they don't offer a lot of real estate' they're actually a little too small for me. They also aren't big on features, but they bring the basics of an Android smartphone at what should be bargain prices.