Cast your mind back to IFA and you might just recall the appearance of a dual-screen mash-up device with no proper branding or launch date. Well, it so happens we've been in touch with the mystery phone's maker, Yota Devices -- a spin-off from the more established Russian telecoms company of the same name -- and we're assured that this is much more than a whimsical concept. The Android-based handset has now reached fully working prototype stage and
