Download latest Android KitKat 4.4.2 stock firmware for MK903V 16GB TV Stick from here or from here.
Download latest Android KitKat 4.4.2 stock firmware for MK903V 8GB TV Stick from here or from here.
Download previous firmware version from here.
Firmware： MK903V_16G_update_20150122 / MK903V_8G_update_20150122
Firmware file name: MK903V_1228_AP6335_update.img / MK903V_1228_AP6330_update
Model： MK903V TV Stick
Image file size: 404 MB / 404 MB
Platform: Rockchip RK3288
Boot version: 2.17
FW version: 4.4.02
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.