Έστειλα μήνυμα στο facebook της EMUI.....κάνω copy paste την απάντηση τους...."Hi , EMUI 5.1 is presently not being offered to devices that are on EMUI 5.0, EMUI 4.1 or lower systems. But please be assured that some of the new functions from EMUI 5.1 will be built into a debugged, featured-enhanced version of EMUI 5.0 that will be released soon. Thank you for your understanding and patience."