Download Android 4.4.2. KitKat stock firmware for CS918 TV Box from here or here. This firmware is for CS968 and the aliases AC8350, Q7, HiSilikon T-R42 or MK888B TV Boxes with AP6210 WiFi module.
Archive name: EKB311B(CS918) Android 4.4-07.10
Firmware file name: update_7_4 / update.img
Firmware file size: 553 MB
Boot version: 2.10
Frmware version: 4.4.02
Firmware file name: update_7_4 / update.img
Firmware file size: 553 MB
Boot version: 2.10
Frmware version: 4.4.02
Support: RK3188
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