@TU-Student I have one little older version of the board and have finding the hardware pins for UART and MASK-ROM and its the same on your. Look on the posted images i haw done before and you is getting all you need.
I can also see that your board have being "fixes" hard or software then its have new label over the original so very likely they have flashing one "updated" Android on it before shipping it.
I have modded the SD-Card so i can have its mounted inside the box then i need it for running HA and its only having 1/8 G that is OK but not flash for running supervised version and is working very well if not using USB that is crashing and need hard restart for working OK.
