Download Android 4.4 KitKat firmware for EKB311 / MK888 / K-R42 /Q7 / CS918 TV Boxes from here or from here. Download previous firmware from here.
Archive name: rk31_cs918_8723_150121_4.4_8g2g_v7.0
Archive file size: 331 MB
Image: rk31_cs918_8723_150121_4.4_8g1g_v7.0.img
Model number: rk31sdk
Platform: RK3188
Boot version: 2.16
FW version: 4.4.02
Build number: rk31sdk-eng 4.4.2 KOT49H eng.ubuntu.20150104.160843 test-keys
Archive file size: 331 MB
Image: rk31_cs918_8723_150121_4.4_8g1g_v7.0.img
Model number: rk31sdk
Platform: RK3188
Boot version: 2.16
FW version: 4.4.02
Build number: rk31sdk-eng 4.4.2 KOT49H eng.ubuntu.20150104.160843 test-keys
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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