The iPhone community reacts pretty fast. Just a few hours after iPhone Dev Team released their Pwnage Tool 2.0 a torrent with a modified firmware was published and an option for jailbreaking iPhones with 1.2.0 firmware is now available for Windows users. I personally couldn’t wait until tomorrow so I gave the method a try. I’ve successfully upgraded from 1.1.4 to 1.2.0 version of the firmware. Here are the steps I followed:

Disclaimer

  • A method that worked for my iPhone follows;
  • This method may not work for your iPhone;
  • If you want to do it do it at your own risk;
  • A successful outcome is not guaranteed;

Prerequisities:

Make Sure the iPhone is Pwned:

  • Launch WinPWN;
  • Click the “Browse .ipsw” button and choose the vanilla 1.1.4 downloaded from Apple’s website;
  • Click the “iPwner” button to proceed:
  • It automatically puts your iPhone in Recovery Mode. If it fails:
    • Try disconnecting and connecting the iPhone;
    • Put your iPhone in Recovery Mode manually:
      • Turn your iPhone off;
      • Hold both the “Sleep/Wake” and “Home” buttons for 20-30 seconds until a yellow triangle appears;
  • A message informing that you iPhone is being Pwned should appear;
  • A message “Your iPhone is being pwnd. Please wait for reboot.” should appear;

Make Sure the iPhone is Neutered:

  • Launch the “Installer” application on your iPhone;
  • Install the “BootNeuter” package (available from iClarified source);
  • Launch the “BootNeuter” application;
  • Select a Bootloader Version (I choose 4.6);
  • Enable “Neuter”, “FakeBlank” and “Unlock” options;
  • Click “Flash” and “Flash It!”;
  • Wait until your Bootloader and Baseband are flashed;

Optionally Put Your iPhone in DFU Mode

  • Turn off your iPhone;
  • Hold the “Sleep/Wake” and “Home” simultaneously for 10 seconds;
  • Release the “Sleep/Wake” and while still holding the “Home” button until the device is detected;
  • Wait until iTunes is launched (if not already);
  • A message is displayed “iTunes has detected an iPhone in recovery mode…”;
  • Click “OK”;

Restore Your iPhone

  • Go to your iPhone in iTunes (if not there already);
  • While holding the Shift key of your keyboard, click the “Restore” button;
  • Pick the custom 1.2.0 firmware you have downloaded;
  • Click “OK”;
  • Wait until your iPhone is restored;
  • After your iPhone is rebooted:
    • BootNeuter starts automatically and flashes your baseband;
    • Your iPhone reboots again;

Troubleshooting

  • In case an error 160x occurs during the restore process try the guidelines in Apple’s Knowledge Base;
  • If you’re experiencing problems restoring in DFU Mode:
    • Get back to Normal Mode (by holding the “Sleep/Wake” and “Home” buttons simultaneously for some time);
    • Try restoring in Normal Mode;
  • In case your iPhone gets bricked try downgrading to 1.1.4;

Have fun!

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