Asus Zenfone 6 Firmware Update V2.21.40.39

Zenfone 6 Firmware Update V2.21.40.39 – ASUS has updated the firmware for Zenfone 6 (A600CG) with software Image: V2.21.40.39 (Android 4.4). In this firmware update there is improved ie Improved system stability, Update phone APN version to 81, Update per Facebook sharing policy, and much more.

If you want to update the firmware on Zenfone 6, but you still have not got the Zenfone OTA updates you do not need to worry, because at this time Asus Zenfone Blog will share a link to download the Firmware Update V2.21.40.29 for Asus Zenfone 6 (T00G).

Improvement Item:

  1. Update phone APN version to 81.
  2. Update per Facebook sharing policy
  3. “Due to changes in Facebook’s service policy, ASUS apps will no longer be able to access the list of all your Facebook friends or their public information such as birthdays, feeds, public albums, and etc. Some features have been modified in order to comply with this new policy. Thank you for your understanding.
  4. Changes on the apps:
    • ASUS Gallery
       Friends’ public albums are no longer in service.
       Likes and comments feature are disabled.
    • ASUS Contacts
       Friends’ recent feeds push notification are disabled.
       Lower resolution profile picture is used.
       Option to set contact’s cover image from Facebook is removed.
       Synchronization of birthday information is not supported.
    • Phone In-call screen
       Lower resolution profile picture is used.”
  5. Improve system stability


Steps of Updates:

  1. Check software version of your device**
  2. Download device software and Update SOP (From “Manual” Item)
  3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
  4. Software update cannot transfer the software SKU and downgrade the software version.
  5. Wrong SKU may cause update failure, please update the same SKU version only.

How to update the firmware on Asus Zenfone 6

  • How to OTA Update on Asus Zenfone 6 ?
    Path: Settings->About->System Updatete->Check for Update
  • How to update via ADB sideload ?
    Tutorial Here
  • Tutorial Here

Asus Zenfone 6 Firmware Update V2.21.40.39

Asus Zenfone 6 Full Firmware Version WW

File Size
735.76 MBytes                                          update 2015/02/03
Download from

Asus Zenfone 6 Firmware Version WW (2.21.40.29 to 2.21.40.39)

File Size
60.41 MBytes                                          update 2015/02/03
Download from

Asus Zenfone 6 Full Firmware Version TW

File Size
755.73 MBytes                                          update 2015/01/30
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Asus Zenfone 6 Firmware Version TW (2.21.40.29 to 2.21.40.39)

File Size
60.51 MBytes                                          update 2015/01/30
Download from
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