This firmware is for M92S Plus TV Box with Amlogic S912 as CPU. You can buy it from Geekbuying.com for only 56.99 with free shipping world wide.
Download latest Android 7.1.1 stock firmware for M92S Plus TV Box from here, here or here.
Download Amlogic USB Burning Tool v2.0.8 from here or download Amlogic Burn_Card_Maker v2.0.2 from here.
Firmware details
Archive: s912m85.M92S_PLUS_7.1_AP6330_1000M.2017.05.19.03.17
Model: Rikomagic RKM MK22 TV Box
Image file size: 648 MB
Platform: Amlogic S912
Image name: s912m85.M92S_PLUS_7.1_AP6330_1000M.2017.05.19.03.17.img
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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