While it was announced last year in 2015, it looks like ASUS are confirming that a number of devices will be getting the Android 6.0 Marshmallow update by Q2 of 2016. New additions since previously include the ZenFone Zoom and Max but it also appears that certain ASUS ZenUI apps like ASUS Messenger, ASUS Mail and ASUS Calender will be replaced by their Google apps as the default apps. You can redownload these apps and install them with a factory reset after the update though. 

• PadFone S PF500KL
• Zenfone 2 - ZE550ML and ZE551ML
• Zenfone 2 Deluxe ZE551ML
• ZenFone 2 Deluxe Special Edition (ZE551ML)
• ZenFone 2 Laser - ZE500KG,  ZE500KL, ZE550KL, ZE600KL, and  ZE601KL
• ZenFone Selfie ZD551KL
• ZenFone Max (ZC550KL)
• ZenFone Zoom (ZX551ML)

We've been waiting for the ASUS ZenFone Zoom for a while now and it looks like the rollout has begun with the official release of the ASUS ZenFone Zoom ZX551ML in Taiwan. So far, 2 versions have been released at 13990 TWD (RM1809) for the 64GB storage version with a 2.3GHz Intel Atom Z3580 processor while the 128GB storage and 2.5GHz Intel Atom Z3590 processor version is going for 15990 TWD (RM2067). A new addition looks to be an artificial back as well which you can see on the ASUS Taiwan site.

Our initial hands-on pics of the ZenFone Zoom had it with plastic back but the rounded metal frame and all the other features remain the same. These include the signature 13MP rear camera with 3X optical zoom, laser auto focus, optical image stabilization and dual LED flash. Other tech specs include a 5.5.5-inch FHD display, 4GB RAM, Android Lollipop, 4G LTE and a 3000 mAh battery. No specific Malaysia release dates yet but earlier reports have the ZenFone Zoom coming to Malaysia this month with the ZenFone Max.