What I am doing wrong? G2

Hi! So, I decide to play with my G2 SciPhone (My phone has configuration as follows: 512Mb (64MB) NAND + 32MB RAM) But I could not run U-Boot... The first step seems to be good. I run Osmocon and download "loader" to the phone. I got "Running on mt62xx in environment mtkram HW_CODE = 0x6235" message. After executing $ ./osmoload memload 0x500000 u-boot.bin I can see progress and successfull download of u-boot.bin First of all I tried to use u-boot from here http://downloads.qi-hardware.com/people/marcin/g2_uboot.bin (http://downloads.qi-hardware.com/people/marcin/g2_uboot.bin) Executing $ ./osmoload jump 0x500000 leads to... nothing. I can see black screen. That's all. Also I compilled u-boot from git using toolchain kindly given by Andrew :-) $ ./osmoload jump 0x500000 leads to gray screen after flashing white for a moment. It looks like wrong LCD controller or driver. So... The simple question. What I am doing wrong? :)