I use VAR-SOM-DUAL with Android 5.1.1. Thanks to the wiki developer guide §6.4 Build for nand
NOTE: Due to android file system size, Android should use SD-Card or eMMC only.
My current board has 512 MB flash memory. Does it mean flash memory is unused by Android ? Can I order VAR-SOM-DUAL without flash memory, or with minimal 128 MB ?