Вот что по этому поводу говорят официалы GT.
with some E50 there is some kind for software-lock situation. It doesn't matter with what you flash it, it will still be dead. We are researching the problem to help revive those phones. What we've tested by now is: if you flash the phone to RM-171, it will work, but will have no camera support. If you fully erase the phone, it will work with RM-170, have camera, but imei will be destroyed ( 123456.....) so you need to rebuild IMEI. As soon as we have solution or more information on the problem we will publish it. Meanwhile please do not speculate by presenting this problem as bug of the flasher.
Источник здесь: http://forum.gsmhosting.com/vbb/show...84&postcount=8