日々更新mobilerA8（Yahoo!ニュースを毎日ウォッチ）

BBCより。側面までだったボタンが裏側にも。

やはり使いやすいといえばｉＰｈｏｎｅ

(Simフリー)　海外版 iPhone5 ホワイト 16G 新品価格 ￥68,000から (2013/8/8 07:53時点)

LGの新しいスマートフォン。
初心者にも使いやすいスマートフォンをということのようだ。
http://www.bbc.co.uk/news/technology-23606919
LG puts buttons on back of G2 smartphone

LG is hoping to shake up smartphone design by placing the only physical buttons of its new flagship model on the rear of the handset.

The firm says the G2 addresses the problem that mobiles become harder to control the bigger they get.

The South Korean company recently reported its strongest ever mobile phone figures.

However, analysts are split over whether or not their latest innovation is a winner.

The new device features a 5.2in (13.2cm) screen and is powered by Android.

Its rear keys can be used to adjust its volume or - if pressed for a longer time - to activate the device's camera and note-taking software.

LG suggests that using a back-button to take a self-portrait with the front camera also makes it easier to take a steady shot.

"Moving the main buttons to the back of the phone gave users more control since this place was where individuals' index fingers are naturally located," it said.

"Researchers also found that moving the buttons also resulted in fewer dropped phones when adjusting the volume while talking."

LG overtook Huawei to become the world's third best-selling smartphone maker in the first three months of the year thanks to demand for its Nexus 4 and Optimus range, according to market research firm Gartner.

One of its researchers suggested the move could indeed help address issues consumers have with the design of bigger mobiles.
LG G2 Research suggests LG is the world's third bestselling smartphone maker

"This is a potentially interesting concept for LG because as phones get larger, the position of the phone in the hand and how you use it is going to change," said analyst Brian Blau.

"Whether the button on the back proves to be a winner long-term has yet to be determined, but it deserves some amount of consideration."

But another tech consultancy, Juniper Research, dislikes the concept.

"I'm not convinced that this represents a killer design," said analyst Michael Wiggins.

"The positioning of the navigation button doesn't appear to be particularly user-friendly, either, particularly if - given the size of the device - you're an individual with smaller hands.

"For a few more millimetres of screen, it's not a great trade-off."

ボタンの機能はボリュームと長押しでカメラの起動とメモ帳ソフトの起動。
片手だと人差し指がちょうどくるので使いやすいということのようである。