If you are interest to know more about the 11.4mm thickness Helio Fin clamshell phone, here are the available reviews on the net.

Brian at Gizmodo / Helio Fin Photo Gallery

The screen is nice, 320 by 240, but there's a great little OLED screen on the outside. Two color, I believe. It shows track names, when music is playing, but mostly message alerts, signal strength, battery, and the time. I like this phone far more than the Drift or Heat. The Ocean is much fatter, but with the QWERTY and widescreen modes, it is far better at taking advantage of the beefy features like YouTube and IM.

James at slashgear

I love it. There are some downsides, well really just two: the first is the microSD card slot, which is underneath the battery cover, right below the battery, meaning you have to remove the battery to insert or remove a card. The only other thing is that I don’t like how the small external display collects fingerprints like it’s CSI, but that is easily fixed by just wiping it off. Like I said, overall I love it and I don’t foresee myself having need of another phone for quite some time.

The Boy Genius Report | Unboxing Gallery

We really like the Helio Fin. Honestly. It’s a great device that’s super small, and yet jam packed with features still not available on a lot of bigger and chunkier devices. As long as you can deal with not having a QWERTY keyboard (believe us, it’s tough at the moment!) we’d recommend this to anyone.