IDK, I did a wipe/factory reset and started working.
The only problem is that I don't get any signal, and when I try to set it up a stock SKT menu appears asking if I want to use roaming...That's the only problem I found.
EDIT:
Now I have signal...so the phone works.
Z4root didn't seem to work.
I can confirm..ROM is working OK
but you have to wipe all data from recovery
BUT....
this is still old 2.1 kernel
(you can put apps on SD card, still...)
edit:
and there are 2 problems
proximity sensor and auto rotate is not working, and touch keys are not illuminated
and Hd video recording is MUCH MUCH better
very fluid, and even in dark it is much better than before...
phone is more responsive than before (even at 550MHz), launcher is much smoother (by design it is the same launcher which comes with XT720), there is no motoblur
quick office is updated...widgets are the same, and that's all..
but unfortunately, I will flash back to 2.1 because of proximity/auto rotate and led buttons
