[Asus 6z too] Asus ZenFone 6 September security update fixes screen flickering issue & improves audio quality

This story is being continuously updated…. New updates are being added at the bottom…..

Original story (from Sept 25) follows:

Asus ZenFone 6 is one of the most innovative smartphones released in 2019. This is despite the market having plenty of unique designs like the Oppo Reno series and Samsung Galaxy A80. However, owners of this device have also had to deal with quite a good number of annoying issues.

One of the biggest must have been one that crippled the motherboard, forcing owners of affected units to ship them back to Asus for replacement units. The issue was brought about by a software update pushed in late July, but no software update could fix it.

Asus ZenFone 6

Other ZenFone 6 issues that have also popped up in recent times include call quality issues, issues with the flipping camera, and the screen flickering issue when the display brightness is set to its lowest.

Just yesterday, we published an article about Asus’ promise to release a software update that fixes the screen flickering issue. Little did we know the update was ready and waiting for someone to flip the switch on.


As of this writing, a new Asus ZenFone 6 September update is already rolling out to those using the device outside India. The software in question is for devices with WW, EU, RU, or JP SKUs and not IN SKU, which usually denotes India.

Yes, the incoming ZenFone 6 September update isn’t meant for the Indian Asus 6z, but we hope the 6z will join the party in the coming days.


The ZenFone 6 September update is arriving as version 16.1220.1909.193 and not only does it bump the security patch level to the latest available, it also fixes the long-standing screen flickering issues on the device.


Also part of the update, according to the official changelog, are improvements to the quality of sound coming from the ZenFone 6 speakers. As usual, you also get system stability enhancements and performance improvements as part of the new build.

【Release Notes】
– Updated 2019 Sep. security patch level. (20190901)
– Improved speaker quality.
– Fixed screen flickers at low brightness.
– Optimized the system stability.

The update is arriving to ZenFone 6 units over the air, meaning some users may have to wait for several days before actually receiving the download notification. If you can’t wait, we have the download link below for manual installation, but be sure you know how this works.

  • Device: Asus ZenFone 6
  • Codename: ZS630KL
  • Channel: WW/EU/RU/JP
  • Version: 16.1220.1909.193
  • Android: 9.0
    • Type: Recovery

Update 1 (Sept 29)

The update is now rolling out for IN SKU i.e. Asus 6z devices too.

NOTE: For more Asus-related coverage, check out this Asus-dedicated section.

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Hillary Keverenge

Review Editor. Besides phones, I also enjoy the farm, music, football, and, of course, food.