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If you're considering any of these three phones, then you are probably interested in having a top of the line smartphone. Given how much lower the Samsung Galaxy S is in both categories, it's safe to discontinue consideration of this particular phone.

LG's G2x and HTC's Sensation is a different story, however. The G2x scores remarkably higher in the Quadrant benchmark program, which measures graphics processing and overall computing power. This means the LG device should perform better in mobile gaming apps and videos.

On the other hand, the Sensation outputs notably more megaflops (1 megaflop = execution of one million floating point operations per second). This means the HTC device has a raw computing power (graphics aside) higher than the G2x, and will consequently perform more fluidly and quickly in tasks like opening applications, switching home screens and opening pictures.

Each phone's specs are listed below. Bold print represents the best in each category for easy recognition.

HTC Sensation
Processor: Dual-Core 1.2GHz
Resolution: 960x540 pixels
Weight: 5 ounces
Shoots Full 1080p Video at 30 FPS, 8mp Camera
RAM: 768 MB
ROM: 4 GB
Talk Time: 8 Hours
Standby Time: 21 Days

LG G2x
Processor: Dual-Core 1.0GHz
Resolution: 800x480 pixels
Weight: 5 ounces
Shoots Full 1080p Video at 24 FPS, 8mp Camera
RAM: 512 MB
ROM: 8 GB
Talk Time: 7 Hours
Standby Time: 12 Days

Samsung Galaxy S
Single-Core 1.0GHz
Resolution: 800x480 pixels
Weight: 4.2 Ounces
Shoots 720p Video at 24 FPS, 5mp Camera
RAM: 512 MB
ROM: 1 GB
Talk Time: 6.5 Hours
Standby Time: 12.5 days

As of July 2011, the G2x and Galaxy S both sell for $449.99, with an instant discount of $250.00 and mail-in rebate card worth $50.00, bringing the end price of both phones to $149.99 before tax (if applicable). The Sensation retails for a slightly higher $499.99. The same instant discount and mail-in rebates apply, bringing the final cost of the phone to $199.99.

Based on all factors, including performance, aesthetics and price, I have to recommend the HTC Sensation. It is worth the extra money. However, if you are dead set on saving that $50, then definitely go with the G2x. It's second core allows it to dwarf the performance of the Galaxy S' single core (rated at the same speed), and with minimal extra battery consumption.

By: E. Brown "EB" on May 26, 2011

Two major complaints - The screen bleeds light. The device randomly reboots. I wouldn't throw this device under the bus if the problem was simply that I'd received a lemon because that happens. If you do a search, however, you'll find this to be a common complaint for this device & one I've experienced a few times personally. What's more, the screen's resolution and vividness isn't up to par for an HD device.

An expensive, dual core, HD phone should have either a higher resolution or an AMOLED screen. This phone is out-classed by it's other dual core, HD competitors.

This high-end device is stuck on Android 2.2 (Froyo) in spite of never ending claims that it will get 2.3 (Gingerbread).

I purchased this phone 2 weeks ago and I'm already on my 3rd device because of the screen bleeding light and device rebooting. If it weren't for these two issues, this would be a wonderful smartphone. ...but then, if I had wings I could fly.

To T-Mobile's credit, instead of giving customer's a hard time, the company acknowledge the issue and willingly & swiftly replaces the faulty units whilst taking up the quality issues with LG. T-Mobile is handling this issue in a timely, fair & professional manner.

If you seek a dual core HD device from T-Mobile, I suggest you go for HTC's Sensation 4G. Do a side-by-side comparison on gsmarena. It has a bigger screen with more pixels (qHd). It shoots 1080p at 30fps, instead of G2X's 24fps. It comes with Android 2.3. It has 250 more mb of RAM.