Asus launched Zenfone 2 with Android lollipop. Today Asus announced that Asus Zefonee 4 (A400cG/A450CG), Asus zenfone 5 (A500CG), Asus zenfone 6 (A600CGG) Â will be getting update mid of the may. and Asus padfone will be getting update at the beginning of June.
Zenfone 5 LTE (A500KL) – Beginning of May
Zenfone 4 (A400CG/ A50CG) – Mid-May
Zenfone 5 (A500CG) – Mid-May
Zenfone 6 (A600CG) – Mid-May
Padfone S (PF500KL) –  Beginning of June