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All smartphone manufacturers want their handsets to stand out - but few have done anything as dramatic as putting an e-ink screen — the sort of think you'd see on a e-reader — on the back of the phone.
But Russian handset maker Yota Devices — spun out last year from Yota (known for its LTE prowess), has done just that.
Lau Geckler, chief operating officer of the newly-formed company, hopes that the launch of this very different smartphone could help make Yota and Yota Devices brands to watch outside of its traditional markets.
The handset I saw at Mobile World Congress is certainly different, and the company is still experimenting with ideas and refining the final design.
For example, I couldn't help but notice that the camera is at the bottom corner on the rear of the phone, unlike other phones.
"We're right now testing with focus groups, getting good results using the camera upside down. We can put it up the other way in the final product if we want," Geckler said
"This prototype is a little bit of playing, the magnetic plate (used for charging) will be moved, we also have an integrated power and SIM slot, which is a new thing. Our dream is to make a phone without any holes or any buttons."
On the rear of the phone is a the e-ink display, which can be used to display any content that you'd normally see on the front of the phone. It actually has a lot of uses, from missed call notifications to live social network updates.
To 'send' content from the front screen to the back, you swipe two fingers vertically down each edge of the front display, but why have the second screen at all?