Hi guys,
Thanks for your feedback. In fact, I don't need the unlock, my iPhone was purchased with the carrier I use. The issue that I have is like the IPSW generated by Pwnage has some problem. I tried the redsn0w and the result was the same.
What I meant by activating is that after the jailbreaking my phone never connects to the carrier network. I'm not sure how is it called in english and I assumed that it was activation.