Download latest Android KitKat 4.4.2 stock firmware for M8 / CM8 / M8S Amlogic S802 TV Boxes from here or here. Download previous versions from here.
Archive: M8 CM8 M8S Amlogic S802 169450 175646 177412-20140929
Image file name: k200-ota-20140807.zip
Model: CMX M8 / CM8 / M8S Amlogic S802 TV Boxes
Firmware: Android KitKat 4.4.2 stock firmware
Image file size: 375 MB
Platform: Amlogic S802Firmware: Android KitKat 4.4.2 stock firmware
Image file size: 375 MB
Build number: k200-user 4.4.2 KOT49H 20140807 test-keys