T-Mobile announces June availability for Samsung Exhibit 4G and Gravity Smart

We've heard rumblings that Samsung's Exhibit 4G would be making its way to T-Mob on June 8, but now the carrier has confirmed that the Gingerbread smartphone will be available sometime in June. The Exhibit will join Samsung's Gravity Smart, both featuring grounded sub-$100 price tags (after $50 rebate) when they hit stores. T-Mob is displaying the Exhibit with violet and black finishes, and says you'll see "theoretical" peak download speeds of 21Mbps on the HSPA + handset. As for the Smart, the carrier's first Android-powered Gravity smartphone will launch with 2.2 Froyo, and includes a slide-out QWERTY keyboard, so you'll be sending Group Texts to 50 of your closest friends with four rows of hardware keys. Both phones include 3 megapixel rear-facing cameras with flashes, while the Exhibit adds a front-facing cam as well, so that myTouch 4G girl may be hawking a new smartphone on your TV later this month.

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Scientist cooks up adjustable strength metals

As you may know, crafting a katana is a delicate process that involves carefully constructing a razor-sharp high-carbon edge around a soft shock-absorbent core. One day though, smiths and forging fires could be replaced by electrode-wielding mad-scientists, with the technology to selectively harden and soften metal at will. At least that's what we envisioned when we read about Jörg Weißmüller's breakthrough research in the field of nanomaterials. The German scientist discovered that by placing precious metals in acid he could create tiny ducts through corrosion. Once those channels are flooded with a conductive liquid, electrical currents can be used to harden the material and, if you change your mind about the brittle results, the effect can easily be reversed to make it soft again. The tech could eventually lead to self-healing vehicle armor or scratch-resistant cellphones -- but, really, we just want to zap our way to a high-quality samurai sword. Physorg

Compal's 'Ultra Mobile' Ultrabook eyes-on

Intel's already teased Compal's "Ultra Mobile" Ultrabook from afar, but when this Ivy Bridge laptop popped up on the show floor after the Computex keynote, we decided to give it a closer look. While this prototype isn't quite in the same league as ASUS' gorgeous UX21, do bear in mind that we're still looking at a relatively slim package for a 14- to 15-inch Core i7 rig. Also visible around the machine are a couple of USB 3.0 ports, an HDMI-out port, a LAN socket, and an SD card reader. Until we hear more about this Ultra Mobile, enjoy our eyes-on photos below. Compal's 'Ultra Mobile' Ultrabook eyes-on omment

TDK starts mass production of transparent OLEDs, makes texting and walking safer

TDK is taking those transparent OLED screens we saw back in October and putting them into mass production. The 2.4-inch, QVGA (240 x 320) UEL476 display has a transmittance of 40 percent, but obscures light passing through the front so others won't be able to read your text messages from behind. Obviously, these aren't going to find their way into high-end Android handsets, but they may have a home in fashion phones like Lenovo's S800. And, you know, they seem perfect for SMS addicts who can't stop their thumbs from flying even while walking.

NYC

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