I tried many things and didn't work.
but then I installed passimg.zip.
So I went backed to shipment version.
Then I connected to wifi and miraculously my phone proposed gingerbread 2.3.3 update by itself OTA
now i am installing it.
wort to try
fastboot oem unlockBy "unlock bootloader" do you mean flash hboot again or a different file?
Yes, and I am cleaning this up.