Download Android 7.1.1 stock firmware SD card version for Mecool BB2 Pro TV Box from here, here or here. Download Android 7.1.1 stock firmware PC version for Mecool BB2 Pro TV Box from here, here or here. Download previous Android 6.0 stock firmware for Mecool BB2 Pro TV Box from here. Download Amlogic USB Burning Tool v2.0.8 from here or download Amlogic Burn_Card_Maker v2.0.2 from here.
Archive: BB2_PRO 20180202
Model: Mecool BB2 Pro TV Box with 3GB RAM + 16GB ROM
Image file size: 711 MB / 784 MB
Platform: Amlogic S912
Image name: BB2_PRO 20180202.zip / BB2_PRO 20180202.img
Build number: Amlogic/q20x/q20x:7.1.1/NHG47L/20180202.141031.V0928:userdebug
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.