LG has an ongoing smartphone problem: despite a few valiant efforts (the G2x comes to mind) the company continues to live in the shadow of rival Samsung. Most of this malaise can be attributed to hit-and-miss hardware combined with lackluster software (we're looking at you, Spectrum). Last February, at Mobile World Congress, LG spiced things up with an attractive collection of devices including the Optimus L7, Optimus Vu and Optimus 4X HD -- the latter being one of the first quad-core handsets announced. Now, six months later, we live in a world where the global versions of HTC's One X and Samsung's Galaxy S III dominate the superphone market and share the quad-core crown. With me-too features like a Tegra 3 processor, 4.7-inch HD display, 8-megapixel camera and Ice Cream Sandwich on board, the Optimus 4X HD appears ready to play in the big leagues. Does it succeed or is it just a flash in the pan? Is it all style over substance or does it bring something unique and meaningful to the table? Hit the break for our full review.