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iPhone 3G firmware 3.1.3 Upgrade & Unlock
Instructions for MAC

THE FOLLOWING INSTRUCTIONS ARE FOR IPHONE 3G ONLY. YOU MUST HAVE ITUNES 9.0 INSTALLED WHEN FOLLOWING THESE INSTRUCTIONS.

How to use these instructions.

Upgrading to 3.1.3 is a simple multi-step process. You must follow each step in order.

If possible please Sync your iPhone with iTunes before starting these instructions, as your data WILL be wiped off of the iPhone. You will get the data and settings back if you have sync'd your contacts, email, photos etc before you start.

As you will be wiping the iPhone, any applications you downloaded onto the iPhone will be removed but the Apple App store applications can be downloaded for free again if you have downloaded them previously.

BEFORE YOU START

Unlocking and upgrading iPhone 3G to 3.1.3 (5 Steps)

YOU MUST NOT USE SAFARI WHEN DOWNLOADING THE FILES DETAILED IN THIS DOCUMENT AS SAFARI CHANGES THE FILES. PLEASE USE FIREFOX FOR THE DOWNLOAD.

Step 1.

Download the custom firmware file below. (remember where you save the file)
When the file have downloaded check its sizes match the following:

3G_ONLY_3.1.3_Custom_Restore.ipsw should be approximately 239.6 MB

Step 2.

Connect your iPhone to the computer using a cable not the Docking Device.

Step 3.

You will now see a screen with an iPhone called the “Summary”
Hold down ALT on your keyboard and click "Restore"

If you do this correctly you will be asked to select a file to open. If you get anything else click cancel and start Step 3 again

Step 4.

In the pop up window that appears navigate to where you downloaded the file (in step 1) and select it

3G_ONLY_3.1.3_Custom_Restore.ipsw and click open

NOTE: This may take 15-20 minutes depending on the condition of your iphone PLEASE BE VERY PATIENT DO NOT DISCONNECT YOUR IPHONE

DO NOT TOUCH YOUR IPHONE UNTIL YOU SEE THE HOME SCREEN WITH ALL THE ICONS OR YOU ENCOUNTER AN ERROR MESSAGE

If you get an error message on iTunes during the restore process.
Click Here For Troubleshooting

Step 5.

IMPORTANT: If you have a PIN code lock on your sim card, you should remove it before proceeding.

You need to have your iPhone connected to the internet when proceeding with the steps below. (WiFi would be the best option)

T-Mobile USA users and any users on NON-3G networks should disable 3G before proceeding.
Settings --> General --> Network --> Enable 3G (OFF)

On your iPhone, go to:
Settings --> General --> About --> Modem Firmware (all the way down)

If your Modem Firmware is 05.11.07

Click "Cydia" on your iPhone Home screen (usually on the 2nd page)
Click on "Manage" - the 2nd icon from the bottom right
Click on "Sources"
Click on "Edit" and then "Add"
Type the following http://cydia.pushfix.com/ and click "Add Source"
Click "Return to Cydia" and then "Done" on the top right
Now choose the source you just added on Cydia "Pushfix.info"
Choose "blacksn0w RC2 Final"
Click "Install" on the top right corner, click "confirm"
After the application is installed, Restart your iPhone 3G
That's it.. your iPhone 3G should be now Unlocked.

If your Modem Firmware is 04.26.08

Open "Cydia" from your iPhone Home screen (usually on 2nd screen)

Go to "Search" - the 1st icon from the bottom right

Type "ultrasn0w" in the search bar
Note that the "0" in "Ultrasn0w" is the number ZERO, not the letter O.

once the ultrasn0w application appears, click on it and then click "Install" on the top right corner, click "confirm"

After the application is installed, Restart your iPhone

That's it.. your iPhone 3G should be now Unlocked.

When the unlock has completed you will see your home screen on the iPhone with all of the icons. In iTunes you will be asked to choose between setting up your iPhone as a new iPhone or to restore your iPhone from a backup.
We recommend that you set up your iPhone as a new iPhone. You will be given the option to resync all of your contacts and applications back to the iPhone on the following screen.