BPI-M3 android 5.1.1 image download link:
1，android version : 5.1.1
2, support double-screen display, MIPI Display and HDMI display.
3, support 720P and 1080P
4, wifi working fine.
5, 1000M RJ45 working fine.
6, emmc working fine.
7 , USB and OTG working fine.https://docs.google.com/uc?id=0Bx7_euv6PUJ_UUc5MU92VFZHMVk&export=download