Hi! I've jailbroken iPhone 3G 4.2.1 with an iPad baseband. I wanted a new clean install because my iPhone got so slow lately and I couldn't sync with iTunes for some reason. Here's the thing, I tried to reset my iPhone an clean everything in the settings page on my iPhone. But everything froze and I had to reboot and now I'm in hell. I tried to install a clean 4.1 firmware and 4.2.1 from iTunes. But I get stuck on the install screen with an apple on it and a loading bar at like 60% or something. Then I tried to install a custom firmware 4.2.1 getting my iPhone into pwned DFU mode etc. But I get stuck once again! This time around 95%. Why can't I install a firmware on my iPhone? Thanks for reading this, please help! I've googled for like 2 days and found nothing.