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 details
Firmware: MK903V-8G-0319_AP6330_Z_Update
Image: MK903V_8G_0319_ap6330_z_update.img
Model: MK903V 8GB TV Stick
Image file size: 422 MB
Platform: Rockchip RK3288
Boot version: 2.17
FW version: 4.4.02
Build number: rk3288-eng 4.4.2 KOT49H eng.root.20141227.103800 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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