Download latest Android Lollipop 5.1.1 stock firmware for Probox2 Z TV Box from here, here or here. Download SD card version from here, here or here. Here you’ll find how to easily update fiirmware via OTA on Probox2 Z Amlogic S905 Android TV Box. Here is the unboxing article and here you’ll find the first impression story.
Archive name: PROBOX2-Z-20160116 / PROBOX2-Z-20160116-sdcard
Image: PROBOX2-Z-20160116.img / PROBOX2-Z-20160116.zip
Archive file size: 412 MB / 425 MB
Platform: AMLogic S905
Inside archive: firmware + factory_update_param.aml + recovery.img
Build number: PROBOX2/p200/p200:5.1.1/LMY47V/20160116:user/test-keys
1. Fixed system crash randomly for operating some apps.
2. Added OTA system upgrade on “All Apps”
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.