ultrasn0w 1.2.zip (http://www.mediafire.com/?1bppap8qbrdudxn) If your having any trouble installing, follow this video (steps are the same for ios 4.1 and 4.2.1 BB 06.15) YouTube – Install Ultrasn0w & Unlock iPhone without WiFi (Supports All 3.0 – 4.0.2 Firmwares) (http://www.youtube.com/watch?v=HjRLwYuJloQ)