Asus has made Android 5.5.1 available for Asus Zenwatch. According to user Verdes8891 on Reddit, his Asus ZenWatch has just received the new software OTA, bumping it up to Android 5.1.1. We have seen Android 5.1.1 on the LG Watch Urbane already, and this update enables the same functionality on the ZenWatch. Build number is LDZ21T.
This update will bring you Wi-Fi support and Apps now get the ability to be always-on and keep your watch’s display on all the time.
Here are the OTA links for download via Android Police. You can download it from here.