Tip & How-To about Apple iPhone 3GS Black (16 GB)

How to identify old or new bootrom for iPhone 3GS

This guide is created to help those who are confused with what their iPhone 3GS' bootrom versions are. The devs haven't created a specific software/tool to make it easier for 3GS users but they are kind enough to tell us how.

Basically, these are the two (2) bootroms used in the 3GS:

  • OLD bootrom - iBoot-359.3
  • NEW bootrom - iBoot-359.3.2
Now, the problem is, how to locate that.


This is how

FOR MAC USERS
  1. Connect/plug-in your iPhone 3GS to your Mac
  2. Put iPhone to DFU Mode. (Read below)
  3. Go to Applications>Utilities> and open System Profiler
  4. Under the Hardware category, go to USB, and click on Apple Mobile Device (DFU Mode)
  5. At the lower part of that, you will find the detailed info. Look for Serial Number and you'll find the bootrom version at the end.
This is how it should look like (click on image to view larger):

FOR WINDOWS USERS
  1. Connect/plug-in your iPhone 3GS to your Windows
  2. Put iPhone to DFU Mode (Read below)
  3. Open Device Manager, open Universal Serial Bus controllers by clicking on the + sign beside it
  4. Select Apple Mobile Device USB Driver, right-click & select Properties
  5. Go to Details tab & select Device Instance Id from the dropdown menu
  6. You'll find the bootrom version at the end of the code on the lower box.
This is how it should look like (click on image to view larger):


Entering DFU Mode
  1. Plug/connect your device to a computer
  2. Turn it OFF
  3. Press and hold the POWER and HOME buttons together for EXACTLY 10seconds
  4. Release the POWER button but keep holding the HOME button until the computer beeps indicating that a USB device is recognized
If you don't get it at first, try holding the buttons for lesser time.


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