Now, you can unlock iPhone with 3.1.3 firmware installed and 05.12.01 baseband version, also unlock 05.13.04 baseband by using ultrasn0w 0.93. If your iPhone is a factory unlock (FU) one, you do NOT need to unlock your iPhone, because it’s already unlocked 🙂 You need to jailbreak your iPhone before you can unlock it. Read … Continue reading How-to Unlock 3.1.3 Firmware 05.12.01 baseband using ultrasn0w