ASUS is rolling out an update to its Zenfone 6 smartphones and it must be available to most of the users via OTA update now. The new firmware update for ASUS Zenfone 6 brings better voice call quality, Camera improvements and much more along with the usual bug fixes. Keep in mind that this update doesn’t bring any Android OS update on Zenfone 6 from existing Android 4.3 Jelly Bean to Android 4.4 Kitkat. We still need to wait sometime for that.
As seen from the screenshot reproduced below, a notification should be appearing now which tells you that a system update is available for the device. Just click on that notification, then download the update over Wifi and follow the instructions to install that firmware update. 
The update is approximately 48 MB in size, so make sure you download it on a WiFi connection instead of cellular one.
Here is the official list of improvements that come with this firmware update: ASUS ZenFone 6(T00G) software Image: V1.18.40.11
- Improve call voice quality.
- Adjust the color tuning of front cam to decrease purplish issue on some modules.
- Add Broadcom SW solution for GPS.
- Remove the attribute of “Last update”.
- Fixed the Front Camera applied EV error.
- Fine tune beautification features to make better-looking selfies.
- ASUS Email
7-1. Add manual sync function to Email widget.
7-2. Add drop-down refresh function to combined view.
7-3. Add “Chat now” function to launch Omlet in the email; you will be able to chat with recipients in the same email.
7-4. Renew drawer interface design.
7-5. System performance enhancement. - ASUS Calendar
8-1. Show lunar calendar information in widget when system language is set to traditional or simplified Chinese.
8-2. In local Calendar, allow to edit or delete a single instance in a series of recurring events.
8-3. Improve widget layout.
8-4. Solve cover display malfunction caused by Emoji file name while gallery folder is linked to calendar event.
Share some feedback with us if you update your Zenfone 6 with this firmware.
