Iphone 3g Custom Restore Firmware 4.2.1 8c148 Ipsw.rar

Redsn0w 0.ix.6b5 jailbreaks iOS four.ii.1 but also provides the added power to install baseband firmware that tin exist unlocked for the iPhone 3GS and iPhone 3G. For other iOS devices,
redsn0w 0.nine.6b5
will simply jailbreak the device just some models will be a tethered jailbreak.

It’due south very of import to recall that the 06.fifteen baseband update for iPhone 3GS and iPhone 3G that is required for an update is irreversible and it will void your iPhone warranty with Apple. This is currently the but way to unlock 05.14 and 05.15 basebands. Proceed at your own risk.

How to Jailbreak and Unlock iPhone 3GS and iPhone 3G with iOS iv.2.ane and Redsn0w 0.9.6b5

If you are wondering how to utilize redsn0w to jailbreak and unlock, you are at the right guide. This is a two stage procedure, first you jailbreak your iPhone with redsn0w and update the baseband, and so y’all unlock the iPhone 3GS or iPhone 3G with
ultrasn0w 1.ii unlock.

• Download redsn0w 0.9.6b5
  or
  download redsn0w 0.9.6b6
  for Mac or Windows
• Download iOS iv.two.1 IPSW
  that corresponds with the hardware that y’all want jailbroken
• Subsequently you have downloaded redsn0w and the IPSW file, launch redsn0w 0.9.6b5 (Windows users must run redsn0w as Administrator in XP Compatibility Mode)
• Click on “Browse”
• Select the IPSW file you downloaded that corresponds to your iOS device

• Jailbreak but: In the next screen, select that you desire to install Cydia
• Unlock & Jailbreak: Select that you want to install Cydia, and also select that you want to install iPad baseband (this works with iPhone 3GS and iPhone 3G)

• If yous have selected the iPad baseband, you will run into a warning screen asking you lot to verify that you want to install the baseband update – this voids your warranty and yous will not exist able to downgrade or revert this update

• Click “Yep” if you want to unlock and sympathize the ramifications of losing your warranty and permanently updating the baseband
• Now follow the instructions in redsn0w to jailbreak and unlock the iPhone, turn it off then connect the iPhone to your computer and click “next”
• Following the directions, put your iPhone into
  DFU mode
  by property the Home and Power buttons together for x seconds, and so release the power push and just concur onto the Home button for an additional 3 seconds
• The iPhone screen may flash
• Click on “Finish” and the device will be jailbroken, if yous chose to install the 06.15 baseband this will exist installed as well
• Note: It’southward a good thought to reboot your iPhone manually before trying to utilise Cydia

Now that the iPhone is jailbroken, you lot need to
unlock the iPhone with ultrasn0w 1.2:

• Once your iPhone has been rebooted, launch the newly installed Cydia
• Tap “Manage” and then tap “Sources”
• Tap on “Edit”
• Tap on “Add” then enter the following URL for a repository: http://repo666.ultrasn0w.com
• Then tap “Add Source”
• Cydia will now update its sources
• Search for “ultrasn0w 1.ii” within Cydia
• Download and install ultrasn0w 1.ii and then restart your iPhone, this will unlock your iPhone 3GS and iPhone 3G
• Enjoy your unlocked iPhone

If you followed the guide correctly, you lot will now have an unlocked iPhone and you will be able to use it on other carriers. Devices that tin can not be unlocked will but be jailbroken, some of which may be tethered. You tin can read the
difference between tethered jailbreak vs untethered jailbreak, but substantially a tethered jailbreak requires you to connect your iPhone to boot the jailbroken device and use things like Cydia and Safari.

For Windows 7 and Vista users, be sure to run redsn0w every bit Ambassador in “Windows XP Compatability Mode” if yous encounter any errors, you do this by right-clicking on the redsn0w awarding and selecting XP Compatability.

Update:
redsn0w 0.9.6b6
has been released and all those who wish to unlock iPhone 3GS or iPhone 3G should use that version instead since it volition provide for better battery life.