Asus has started roll out a new OTA update for their Asus Zenfone 3 Deluxe (ZS550KL). The update is carrying the version number 126.96.36.199 and comes with some small changes including an improved touch performance.
Other changes, according to the changelog, are the add of Pure mode in the Audio Wizard when using the earphone and a NFC tutorial.
It is expected that users will get a notification of the update. You can also manually check for the update by heading to Setting ->About ->System Update.