Download Android Jelly Bean 4.2.2 stock firmware for RK3028a tablet from here or here


Firmware details
Archive name: QQ2A RK3028A做货英文软件
Image: update.img
Firmware file size: 212 MB
Firmware version: Android Jelly Bean 4.2.2 stock / 4.2.02
Support: Rockchip RK3028a / RK302A
Boot version: 2.07
Model number: rk3028sdk
Build number: rk3028sdk-eng 4.2.2 JDQ39 eng.cheng.20131217.171712 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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