Download Android Lollipop 5.1.1 beta firmware for Acemax KII TV Box from here or from here. Download previous firmware from here. Download latest Android KitKat 4.4.2 stock firmware from here. To flash firmware on this box from PC via AMLogic USB Burning Tool read this article.
Archive: K2 S812 AP6330 22102015
Model: Acemax KII TV Box
Image: KII USB 20151022 5.1 / aml_upgrade_package.img
Archive size: 506 MB
Platform: Amlogic S812
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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