Download latest Android KitKat 4.4.2 stock firmware for Tronfy Ubox R89 TV Box from here, here or from here.
Firmware details
Firmware： TRONFY_R89_V4.1.1Firmware details
Image: TRONFY_R89_V4.1.1.img
Model： Tronfy Ubox R89 TV Box
Image file size: 388 MB
Platform: Rockchip RK3288
Boot version: 2.15
FW version: 4.4.02
Model number: R89
Build number: rk3288-eng 4.4.2 KOT49H eng.sz.20141218.195040 test-keys
SDK version: RK30_ANDROID$(PLATFORM_VERSION)-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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