[Upgrade] Zenithink ZT-280 C91 to Android 4.0 (Guide & Video)

Discussion in 'Zenithink ZT280 C91 & C91 Upgrade' started by af2000, Jan 20, 2012.

  1. af2000

    af2000 Member

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    Location:
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    Tablet / Device:
    iPad 2, Samsung Galaxy S II, Teclast P76Ti, Zenithink ZT-280 C91
    10″ Zenithink C91 (512MB+8GB) Android 4.0 ICS Beta Firmware

    About

    This is the Latest Android 4.0 Beta Firmware for 10″ Zenithink C91 (512MB+8GB)
    Version: 10″ C91 (512MB+8GB) android4.0 20111224_3n Beta Version
    File Name: ZT280_H1_3n_C91_Android4.0_1224_V1.0.rar
    File Size: 157MB
    Release Date: 2011-12-24
    MD5: 6874A36050A0AF355E8E5B5B8C01FA1A
    SHA1: FC31C06DECBA639A4CADA6CD22A0224E952055F2
    Note: This version is the beta version for Android 4.0, Android 4.0 Version is being released continuously.


    Download

    Click Here to download.
    Guide

    Step #1
    Make sure the microSD card is fully formatted.

    Step #2
    Keep the machine being charged.

    Step #3
    Extract the firmware which you get or download, then copy the whole “zt-update” directroy into the root directory of TF card.

    Step #4
    Shut down your tablet, and insert the microSD card into the card slot. Hold the camera button (next to the volume button) and then press the power button. Hold both until the screen lights up and it should show you a different screen that starts the update.
    $zt-280 c91 camera button.jpg

    Step #5
    Place the tablet on your desk and leave it alone. Note: don’t touch the screen when it is upgrading.

    Step #6
    Machine will restart automatically when upgrade is done. Then, please calibrate the touchscreen. After that, you can start experience the ICS system on your C91.

    Video – ZT-280 C91 Upgrade Guide



    Video – ZT-280 C91 Upgraded To Android 4.0 ICS
     
    Last edited by a moderator: Jul 29, 2014
  2. af2000

    af2000 Member

    Joined:
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    Location:
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    Tablet / Device:
    iPad 2, Samsung Galaxy S II, Teclast P76Ti, Zenithink ZT-280 C91
    [UPDATE] Latest Android 4.0 Version for ZT-280 C91

    Zenithink official site released Android 4.0 3rd version firmware for ZT-280 C91.


    Resource Update


    • 1. Add ethernet icon.
    • 2. Support USB Debugging.
    • 3. Support Bluetooth file transfer.
    • 4. Add GoKeyboard,GoWeather forecast,MSN,Skype and Slatedroid App.
    • 5. Bug fixes.

    Known Issues


    • 1. Can not support the following audio formats: AC3,AIFF,APE.
    • 2. Can not support the following video formats: TS,WMV,MKV,TP.
    • 3. Can not support Adobe Flash Player.
     
    Last edited: Jan 20, 2012
  3. trinkyap

    trinkyap Member

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    Hello.
    I tried to update my version of the C91 at 10 "C91 (512MB +8 GB) android4.0 20120211_3a.
    After pressing simultaneously, the keys camera and power-on, there are the following sentences:

    camara key ...
    Prepare enter mmc update mode
    udating system start ...
    skip recovery ..


    Nothing happens. No update is performed.
    C91 starts normally.
    I use as a sd card, a Scandisk 32 Gb.
    What is the problem?
    thanks
     
  4. charlya

    charlya Member

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    I had the same problem - the upgrade was ignored, and C91 just starts normally without updating.

    Following a suggestion I found elsewhere (sorry I can't find the link again), the fix was to clear out the SD card (mine had several other files/folders on it), so that the SD just contains the zt-update directory and its files.
    When I then retried the upgrade it then went ahead ok.
     
  5. rvrkazan

    rvrkazan Member

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    +1
    same problem....
    tried to format my card - no effect
     
  6. rvrkazan

    rvrkazan Member

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    PROBLEM RESOLVED!
    just tried another sd card(sandisk 2gb)....firmware upgrade is done!
     

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