Dual-screen smartphones are increasing. The YotaPhone notably inspired Oukitel for U6 which he is preparing to launch. It is for the time proposed for pre-order in an import store. The Helio X20 announced the first rumors is however not present. Pity.  Oukitel certainly not the most famous Chinese manufacturers but quite regularly manages to attract our attention through a catalog for less varied. The last time was in July with the U6. It was a question of rumors, but rumors promising. The most notable detail was the presence of an electronic ink screen on the back, as on the YotaPhone,