Apple ipod

Is there any way I can now jailbreak my iPhone again so you can work with an O2 SIM?

I had my jailbroken iPhone 3G for about four months. Yesterday I noticed that my wifi was not working, I followed some advice found on jailbreaking a website that I should reset the network settings. I did and then my iPhone died. When he turned to him to insert Itunes screen. I usually just run blackra1n and ordered everyone. This time the work and my iPhone failed done to restore with iTunes (once began to do what I could not stop!). My iPhone now clearly have the latest updates to iTunes have free. He tells me now that I have to insert a SIM card to run, but will not accept my O2 sim! My question is: Is there any way I can now jailbreak my iPhone again to can work with an O2 SIM? It was brought by Tesco. Hope it makes sense and someone can help me.

The more you mess around with these smart phones, deteriorate further, and realize they are not as smart as you thought they were, the software is built around sensitive.You not be larger knife in the table at work if it is not broke do not fix it, is not a good thing, all you get to the end is a pile of garbage that no longer works … just stop playing with him

How To: Jailbreak & Unlock iPhone 3G & 3GS on 3.1.2 Firmware Using BlackSn0w (Mac & Windows)