Asus delays Android Lollipop updates for the 2014 ZenFone series, PadFone S, and PadFone Infinity 2
Right now, Asus says that the ZenFone 4, ZenFone 5, and ZenFone 6 (pictured below) will be updated "as soon as possible", but it can't provide a specific time frame for this.
Other two Asus devices that will eventually get Android Lollipop are the PadFone S and the latest PadFone Infinity, aka PadFone Infinity 2. Once again, Asus can't say exactly when these will get Lollipop, noting that the update plan for the Infinity 2 had to be postponed "due to limitation of the processor." In the meantime, the PadFone Infinity 2 should receive some updates based on Android KitKat.
Do you have any of the Asus devices mentioned above?
source: Asus forums via GSM Arena