Hello, I have several of these devices now and am working on porting fernly code for the fernvale board (and other mtk626x devices) to osmocom-bb.
I found this document: https://elinux.org/images/9/9a/Getting_the_First_Open_Source_GSM_Stack_in_Linux.pdf and was wondering about the "GSM RF chips slide" which seems to indicate that you may have written RF HW drivers enough to transmit? I don't see the u-boot sources from the links at https://osmocom.org/projects/baseband/wiki/SciphoneDreamG2 but interestingly I can get to them directly with git. :) git clone git://git.osmocom.org/uboot-mt623x.git So I will take a look at what you have and see if I can get somewhere with these devices. If you have any suggestions please let me know. Cheers, Craig