You're wrong buddy. Not all Nokia keep its lock code after reflash. N-series erased it's lock code to a default one "12345" after reflashing. My N95 does that. But you cannot reflashing the phone without the lock code if the phone is locked. But there is a way to get around it though you just need to do the key combination self reflashing to out of the box experience. The 3 buttons rules will erase the lock code completely. And the 4 buttons on N97. But not so sure about the N900 because I have not tried flashing it.