Software Update for Asus Zenfone 2 Starts Rolling

The first devices of the Zenfone 2 series i.e. ZE551ML & ZE550ML are receiving a new software update starting today. It’s been 50 or so days since the last update was pushed and users who were hoping of an Android OS upgrade (to 5.1) are going to be disappointed because the new update still carries Android 5.0 as its core. Today’s update pushes the software version from to which isn’t really satisfactory given the time taken to deliver this update.

Zenfone 2 Update  – Changelog

The latest update for ZE550ML and for ZE551ML bring the following set of changes and improvements.

  1. 1 Improve screen turn into black during phone call issue.
  2. Fix Miracast frame rate drop issue.
  3. Fix NFC connect issue.
  4. Fix network data warning notice don not come up issue
  5. Fix Wi-Fi connect issue
  6. Fix 3G cannot camp to H plus in Laos and Paraguay issue.
  7. Fix the coming call issue when using Bluetooth earphone.
  8. Fix Unlock Tool issue.
  9. Improve service stability of modem
  10. Fix the charging issue of roaming to LTE when data roaming option disabled
  11. Fix boost stability issue
  12. Fix the issue that user would still receive the notifications from Auto start denied Apps
  13. Fix ASUS Mobile Manager data usage restriction issue
  14. Fix ZenMotion Shake Shake screenshot issue
  15. Fix URL recognition issue in Messages
  16. Modify HK Chinese strings
  17. Fix IME issue when open Yahoo PC version webpage by ASUS Browser
  18. Fix countdown alarm issue after set in Snap View
  19. Fix string issue in Theme Apps
  20. Fix charge remained time display issue when quick charging
  21. Fix SIM PIN lock issue in Cover View
  22. Modify Quick charge notification UI layout
  23. Fix System UI stability issue
  24. Fix Power saver settings issue
  25. Fix JP FlipFont issue
  26. Fix Battery Simplified Chinese string issue
  27. Fix ASUS Mobile Manager data usage calculation issue
  28. Improve Auto Start Manager stability
  29. Remove BookLive from JP SKU
  30.  Fix Documents UI stability issue
  31. Fix Snap View UI issue and improve its performance when install 3rd party apps
  32. Improve Hand Writing accuracy
  33. Fix flashlight turn-off issue when double tap power key
  34. Fix Power Saver Ultra saving mode notification settings issue

Zenfone 2 update november

There are a bunch of new features as well:

  1. Add phone number editing function in Dual SIM settings
  2. Add 128G SD card turn into Power Saver mode function.
  3. Add Latvian and Lithuanian languages

Manually Install Update to Zenfone 2

The updates are being rolled out globally. Your device will notify you about the update in the coming hours and will also start downloading automatically depending on your settings. You can force a manual check for the updates by heading to Settings> About> System update and tapping on Check Update.

If you don’t get the update within a week, you should approach the Asus website to download the full ROM package and install it manually.

Meanwhile, we are still hoping that Asus will offer Android 6.0 Marshmallow for Zenfone 2 devices because they deserve it.

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33 Responses to Software Update for Asus Zenfone 2 Starts Rolling

  1. Faraz November 17, 2015 at 4:35 am #

    my zenfone2 ZE551ML is not getting on.. only bootloader is on and os not getting boot.

    • jay4567cod February 9, 2016 at 11:08 pm #

      You’ll have to install a new boot and firmware image its not hard to do I had to do it to get my phone to the WW firmware
      Use this link it’ll help fix your phone or contact Asus support to get it sent in for repares

      Hope I don’t get in trouble showing links

  2. Chee Chean Lin November 18, 2015 at 9:30 pm #

    After updatetjis firmware, baterry drains very fast, before update, baterry use 2% per hour, aftervupdate consumpt 10% pet hour.

    • Narender Singh November 18, 2015 at 11:57 pm #

      I’m also facing some additional battery drain after this update. Hopefully a fix update would be here soon.

    • SlothLovesChunk November 27, 2015 at 8:04 pm #

      Yeah, I am having massive memory leak issues since this update. I will have one or two active programs open and the RAM usage will be at 3.5GB or more making the phone lag like crazy. I also have the battery issue, they need to fix this asap.

  3. imaqid November 24, 2015 at 7:32 pm #

    Just finished updating, and I noticed that it changed the camera. I think camera was better BEFORE the update. Now it’s slow and dark?? Idk. Maybe it’s just mmy unit??

  4. nina December 1, 2015 at 6:35 am #

    i can’t receive text messages since the update.

  5. Tlongkins December 23, 2015 at 5:44 pm #

    Should i do an update then? I already downloaded the update but still has not yet installed it. If ever, how do you delete the update file?

  6. joop December 24, 2015 at 10:33 am #

    when i update to current upload, it said Zen UI unfortunately stopped working? dont know how to undo it

    • Narender Singh December 24, 2015 at 10:41 am #

      That can sometimes happen. If it happens constantly, try clearing the Cache from recovery.

  7. Zenfone User December 28, 2015 at 7:35 pm #

    After this update, the external MMC issue returned 🙁 my mmc constantly disconnecting and reconnecting on my phone… anybody knows how to fix this?

  8. Tlongkins December 28, 2015 at 8:36 pm #

    Hmmm same here. Just noticed it now. I just thought since my mmc is old already, this eff up is normal.

  9. Rishabh January 5, 2016 at 1:28 pm #

    What are the visible changes after this update

    • Narender Singh January 5, 2016 at 5:56 pm #

      No such visible changes that I’ve noticed.

  10. Tlongkins January 6, 2016 at 4:27 am #

    yep, no visible changes other than the reported bugs. as for the memory card, asus said something about using a class 10 card. my sd card has been with me (2GB—yes only 2 GB), for the past 5 years. nothing much on it but a few pictures and some contact info.

    temporary solution: unmount it until i get a new one.

  11. WANG DORJEE SHERPA January 7, 2016 at 4:18 pm #

    after downloading new system update ( date o7/01/2016) an error is occuring n now im not able to switch on my phone coz whenever i tyry to on my phone new system upgrade tries to install and an error screen appears, so i need a quick help.

    • Narender Singh January 8, 2016 at 12:20 am #

      Please try manually installing the full update via Recovery.

      • WANG DORJEE SHERPA January 8, 2016 at 1:13 pm #

        how to update manually via recovery mode?

      • WANG DORJEE SHERPA January 8, 2016 at 1:21 pm #

        as my phone is not starting now… while booting it tries to install that update which i have downloaded through (setting/system update) and again an error occurs n dosenot starts….i have rooted this phone once but after few days i have unrooted it again. plzz help me… THANK YOU

  12. BigJ January 8, 2016 at 7:51 am #

    Hello, have you heard any issues on memory card recognition in the latest firmware update of the ZE551ML ? I was forced to reset my phone and use the old firmware, because the update couldnt recognize my 64gb memory card.

    • Narender Singh January 8, 2016 at 12:44 pm #

      I’m not aware of any as of now. My 32GB card works fine in my phone though.

  13. Misskey January 19, 2016 at 6:33 am #

    Guys, im facing auto shut down at 30 %. What haappen to this? I researched fhaf they said need to update to the latest software then can solve the problem. Is it true?

    • Narender Singh January 20, 2016 at 11:20 pm #

      When I faced it, Asus recommended me to charge the phone to full and let it stay plugged in for another hour or so. It never appeared again after that. You can try an overnight charging in switched off mode. AFAIK, an update wouldn’t solve such a battery calibration issue. But if the latter doesn’t help you, try performing an update.

  14. jaycool January 23, 2016 at 8:02 am #

    why it take so long to receive a 6.0 marshmallow update?common asus its 21st century even generic brands of mobile phones they’ve already updated to 6.0…my asus zenfone 2 is a high end device not a generic one…just wondering…peace

    • Narender Singh January 23, 2016 at 12:02 pm #

      Which generic brands are you talking about? I’d just like to know because according to me, there are not many who have started pushing Marshmallow if they have a highly customized setup over stock Android.

  15. raynal January 30, 2016 at 12:04 pm #

    after update my asus died

    • Narender Singh January 30, 2016 at 5:54 pm #

      Died as in how? It is stuck on the Asus loading screen?

  16. Shajib February 10, 2016 at 9:01 pm #

    I failed to system update properly, from then my asus zenfone2 still running autostart….. 3G sim port is not supporting,totally off, bluetooth and wifi is not supporting…. What i can do now?

  17. Meghan March 1, 2016 at 2:14 pm #

    For some reason my asus zenfone2 wont receive text messages i was receiving text messages just fine before the recent firmware update but now nothing only can receive messages from a few people any ideas?

  18. Elias March 25, 2016 at 7:59 am #

    Phone worked great until this update. It frozen the battery percentage, an started to randomly shut off. Now my phone won’t even turn on. Thanks for nothing.

  19. jayanth August 11, 2016 at 4:09 pm #

    till now i did not get the marshmallow update to my phone zenfone 2 laser ZE550kl and when the update gets to my phone its update and after i selected the rebbot your system it saying that your device is came to old configuration

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