Hi Marcin, hi list,
today I received the Sciphone G2 and 'hacked' the headphone cable into a serial cable (which worked quite well, compared to the Mobistel).
osmocon worked on the first try. I only had to modify the UART_BASE address in my mtk test code (steve-m/mtk_hack). (log attached)
I've used the FT2232 UART on the OpenMoko Debug Board, but it works with a PL2303 as well.
Now we need to find out why it doesn't work for you...
Regards, Steve