I had an Iphone given to me which I was delighted with. Problem was it was locked to O2 so I had to try and unlock it.
After many searches and looking at youtube guides the site that did it was IClairifed great site. One of the links was down so I did a search for BL2 for the right file, sorted it out.
I think the biggest mistake I made was trying to apply a 3G unlock on a 2G model so it's critical to know exactly the type of phone you had.
Now though I have an unlocked 2G iPhone for nothing!
Still yet to actually get the 2g part working. Orange told me to launch itunes and apply an update, yeah great that locks it back to O2 again so don't do that!