ASUS has just announced its Android 6.0 Marshmallow Plans for upgrading their exisitng Smartphones.
The company at the moment is planning to provide Marshmallow update to the following devices (Model numbers included):
PadFoneS (PF500KL)ZenFone2 (ZE550ML/ZE551ML)ZenFone2 Deluxe / Special Edition (ZE551ML)ZenFone2 Laser (ZE500KG/ZE500KL/ZE550KL/ZE600KL/ZE601KL)ZenFone Selfie (ZD551KL)
The bad news though is, there is no announcement about the expected time or date for these rollout.