Android Phones Take Over Mobile World Congress

Lowdown: The Incredible upgrade goes high-end

What's hot: Feels more expensive than previous model, as it comes with elegant aluminum unibody, 8-megapixel camera and 720p video recording.

Not so hot: Doesn't come with the latest OS, but only with Android Froyo (2.2)

Go hands-on with the HTC Incredible S

Lowdown: Strong iPhone competitor with amazing display, dual-core processor and Android 2.3

What's hot: Great 4.3-inch high-resolution display, light and thin, 8-megapixel camera with 1080p recording and HSPA+ (21MBps) connectivity.

Not so hot: Looks like a bigger iPhone 4

Go hands-on with the Samsung Galaxy S II

Lowdown: Slight update over previous model arrives in the second quarter

What's hot: Bright 3.7-inch display with 1GHz processor and 720p recording with 5-megapixel camera in an aluminum unibody.

Not so hot: No dual-core processor, few design improvements.

Go hands-on with the HTC Desire S

Lowdown: PlayStation Portable meets Android 2.3

What's hot: Has a slide-out panel containing the Sony gaming D-pad on the left side, the four symbol-etched game control buttons on the right, and a set of circular touchpads in the middle, which act like analog joysticks.

Not so hot: Bulky, plasticky, will only work on Verizon initially.

Go hands-on with the Sony Ericsson Xperia Play

Lowdown: The official unofficial Facebook phone

What's hot: Dedicated Facebook hardware button for uploading photos, videos and update statuses on the fly via Android 2.3 Gingerbread.

Not so hot: Average specs; positioning of the Facebook button looks slightly out of the way.

Go hands-on with the HTC Salsa

Lowdown: Create and share 3D content without glasses

What's hot: 4.3-inch display to watch 3D content without glasses, dual 5-megapixel cameras for 3D video recording and 3D HDMI out video.

Not so hot: 3D experience works only at certain viewing angles, won't come with latest Android version.

Go hands-on with the LG Optimus 3D

Lowdown: Budget Gingerbread phone arriving in the second quarter

What's hot: Nice, clean design with rounded corners and solid build, coming in three colors: a light purple, stone gray and black.

Not so hot: Average specs, with a low-resolution 3.2-inch display, 5-megapixel camera and 600MHz processor.

Go hands-on with the HTC Wildfire S

Lowdown: Refreshed Sony Ericsson Android 2.3 line

What's hot: 8.1-megapixel camera with Sony's Exmor R CMOS sensor for bright photos and videos even in low light and HDMI output. Pro version has full QWERTY slide-out keyboard.

Not so hot: No dual-core processor, average display

Will the new Xperia line get any love?

Lowdown: BlackBerry-style Android phone with Facebook integration

What's hot: Full QWERTY keyboard and hardware Facebook button for quick posting content on the social network and dual cameras.

Not so hot: Only 600MHz processor, small 2.6-inch touchscreen.

Meet the HTC Facebook phones

Lowdown: Highly-pocketable budget Android 2.2 phone

What's hot: Small form-factor with a 3.1-inch display, QuickOffice and Swype keyboard for easy texting.

Not so hot: Sluggish 600MHz processor, 3-megapixel camera, only Android 2.2.

View Samsung Galaxy Mini specs

Lowdown: Budget-conscious 2.8-inch Android 2.2 smartphone

What's hot: Handset costs as low as $50 on a two-year contract with T-Mobile starting this spring in the United States.

Not so hot: Slow processor, 150MB internal memory, 2-megapixel camera

More on T-Mobile's budget line

Mobile World Congress 2011: The Hottest Devices So Far