ASUS has scheduled a Zenfone 5 announcement for February 27 in Barcelona, with #backto5 tag line. Several pictures taken from a manual show the unannounced Asus ZenFone 5 from all angles. The information contained in the document also confirms the smartphone will feature a 5.7-inch display with 18:9 aspect ratio.
Based on leak image, Asus still use the 3.5mm audio jack, which is positioned on top of the smartphone. The microUSB port is included at the bottom between speaker and mic. Fingerprint on the back and dual camera in vertical position. Based on this configuration its looks like ASUS mid-tier smartphone in ZenFone 5 series.