Download Android Jelly Bean 4.2.2 stock firmware for RK3028 SoundTab from here or here


Firmware details
Archive: update.technisai.2014.7.10
Archive size: 254 MB 
Image: update.technisai.2014.7.10.img
FW version: 4.2.02
Boot version: 2.05
Platform: Rockchip RK3028
Model: rk3028a / RK302A
Build number: rk3028a-eng 4.2.2 JDQ39 eng.lucid.20131030.200000 test-keys
SDK version: RK30_ANDROID4.2.2-SDK-v1.00.00



Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data. 


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