Download latest Android KitKat 4.4.2 stock firmware for MK809 4K TV Stick from here or from here. Download previous firmware from here.
Firmware details
Archive name: 20150711_rk3288_dongle_14.1_fw
Archive file size: 398 MB
Image: update.img
Boot version: 2.17
FW version: 4.4.02
Build number: rk3288-eng 4.4.2 KOT49H eng.yanghui_test.20150701.124047 test-keys
SDK version: RK30_ANDROID$(PLATFORM_VERSION)-SDK-v1.00.00
Model number: MK809_4K
Archive name: 20150711_rk3288_dongle_14.1_fw
Archive file size: 398 MB
Image: update.img
Boot version: 2.17
FW version: 4.4.02
Build number: rk3288-eng 4.4.2 KOT49H eng.yanghui_test.20150701.124047 test-keys
SDK version: RK30_ANDROID$(PLATFORM_VERSION)-SDK-v1.00.00
Model number: MK809_4K
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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