Hello, I'm very new to this iPhone jailbreaking stuff. I have tried pretty much everything i found on the net including apps, tips and tricks, yet nothing works. Here's the deal: I bought a second hand iphone from this person. It's a 3G 16GB black one. It worked OK without a sim. Then of course, i put in my own sim which is isn't an official supported sim card (as itunes says so). Now i can't get passed the emergency call screen when the iphone is booted. After all my failed attempts, i'm beginning to wonder if it is possible to jailbreak my iPhone? The only thing i can do right now is restore to 3.0 through itunes after putting it in DFU and playing around in the emergency call screen. Can i jailbreak my iphone in this situation? Does my sim need to be in the iphone or doesn't it? Redsnow is just waiting for reboot, for the past 45 minutes. Unplugging it and plugging it back in didn't work. USB hub didn't work, .. I tried everything. I even tried redsnow for windows on another pc, didn't work either. I tried ziphone: gave an error. I tried pwnagetool: seemed to work but when it tells me to go in DFU, it's got it all wrong. The first step is to seemingly connect the iphone. I do that, but it doesn't go to the next step (turn off iphone). If i play around with it, pretending to be off, and holding the home & power button it looks like it's going to work until i get the error that DFU failed. I don't know what's wrong? How come's nothing working here? :s Help!