problem with unlocking (or activating) iPhone
I have following problem: I have iPhone, but I don't know anything about it. What firmware it has, what software, nothing. This iPhone was jailbroken and then my brother tried to upgrade it but it failed. iPhone got into Restore mode. iTunes 10 saw it as a phone for Restoring. So I restored it to factory settings with iTunes. Then, what I got was picture of USB cable and PC. I was only able to make emergency calls, but not all. I couldn't dial *3001#12345#* to get version of firmware. But I could call the police... . It showed message so I should put right Sim Card. iTunes says the same. So I bought ZCGH Turbo Sim and put it in with my Sim card. Without Turbo Sim, the phone did nothing, but with this Turbo Sim it was searching for phone network and then showed message about wrong Sim Card, and then was searching and it was like that over and over again. But without success. It didn't connect. This Turbo Sim works with iPhone software 2.2.1. So I downloaded such version but I cannot load it into iPhone. No matter what I do it shows: error 1600. But I tried older versions of iTunes and I got message: 'this iPhone can only work with iTunes 9.2 and newer'. So this is, I think, importand clue about this iPhone. The only clue at the moment. I tried different things but without success.
Now I am again in Restore mode. What should I do now?. Restore it to factory settings with iTunes?. Or, perhaps, there are other tools?.
How can I unlock such phone?. I don't even know this iPhone mobile operator (it was bought jailbroken).
Can anyone help me?
Thank You for answer.