Downloadthe Bluetooth firmware for your device from the Download hub link. Ensure your device is connected to your smartphone/tablet before you use the App. Follow the YouTube links to help update your device. If your update fails please try a good few times more. Unpairing your Bluetooth device and fully restart your smartphone/tablet.
AndroidTablet Firmware Downloads: So here are the Chinese Tablet firmware files of the most sought after devices, also note that the files are usually compressed with WinRAR or are direct .img files: A13 Q88 software 0309-20121108-Q8-V0709 Download. 3. A13_4.2.2_HX_Q8_V5+2cam_nuclear_ococci-eng 4.2.2 JDQ39

Step3: Download Odin v3.07 which will help to install the Android 4.2.2 firmware on the phone. Extract the Odin zip to get Odin3 some other files

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android 4.2 2 firmware download