1.1.3 OTB

Update : A much faster easier solution for Mac users can be found here. Windows users may resort to ZiPhoneGUI.

I am back after spending 4 hours on the entire process (which includes some hits and misses! Which means, you no longer have to figure out the right steps/combinations!!). Now the process is trimmed down to much lesser time and the best part being : No command line hackery!

All you need is an iPhone (OTB 1.1.2/1.1.3 BL 4.6), Mac (preferable) / Windows, Firmware files (1.1.2, 1.1.3 ipsws), courage to try this all on your pricey iPhones 🙂 (Trust me, it is so easy!!). Please note I used the ATT sim that comes with the iPhone all the way till the iPhone is unlocked.

I am performing this Unlock on a brand new 16gb iPhone that cam out with 4.6 BL and 04_03_13GB BB. Please proceed with his guide only if you have an OTB 1.1.2 or 1.1.3 with 4.6 BL.

UPDATE : After trying this method for one full day, I had some issues with 1.1.3 Dev Team’s soft upgrade. I had no problems restoring it to 1.1.2 and the Unlock sustained just fine. Hence, I recommend using 1.1.2 until a stable 1.1.3 is achieved.

Step 1 : The most important and tricky one : Downgrading OTB 1.1.3 to 1.1.1 (From _BigBoss_)

• Turn your iPhone off and hold the power and home buttons for exactly 10 secs (yeah count them!).

• Now, release the Power button still holding the Home Button till iTunes prompts this message ( you get a beep sound both on PC and Mac ). Remember that the display doesn’t show up at any point.

If you have come this far, you have completed the tough part, now for the time consuming sit-back and let-it-perform part!!