iPhone 3G Firmware; iOS 4 To 3.1.3; Download and Install IPA for Mac OS X the modified .ipsw file that you should restore to for iPhone 3GS users It is a 4.0.2 firmware Visit Site
http://www.mob2all.com/2010/08/how-to-downgrade-ios-402-to-401-40.html?utm_source=twitterfeed&utm_medium=twitter&utm_campaign=Feed:+mob2all+(Mob2All)

Download software, books, script, OS, Photoshop, Anti-virus STEP 2 - DOWNLOAD FILES 1. Download firmware 4.0.1_8A306 from for your downloaded firmware file. Select that ipsw file Visit Site
http://www.vientay.com/f/f9/iphone-3gs-downgrade-jailbreak-unlock-364306.html

Download Custom iPhone OS 3.1.2. Custom IPSW for iPhone OS 3.1.2. Download Custom OS 3.1.2. Custom iPhone OS 3.1.2 custom ipsw file. iPhone OS 3.1.2 Custom Firmware Visit Site
http://www.iphoneheat.com/2009/10/download-iphone-os-3-1-2-custom-firmware-ipsw-files-for-iphone-3gs-3g-2g/

1] Download iOS 4.0.1 ipsw firmware for iPhone 4, iPhone 3GS, iPhone 3G Go –> Go to Folder” from Finder [For Mac OS X] - Now open “hosts” file in Visit Site
http://www.solidblogger.com/how-to-fix-itunes-1004-1015-error-and-restore-ios-4-0-1-iphone-4-iphone-3gs/

* iPhone 3G/3GS/2G 3.1.3 Firmware and iPod Touch 1G/2G 3.1.3 OS. Related cool stuff: Download Link Wndows .Net 3: Sn0wbreeze will now create the custom .ipsw file for your iPhone Visit Site
http://youtube.com/?v=8iXJLUNW8a8

Below are the links for Custom Firmware (ipsw) for OS 3.0, read FAQ at end of this post to know more about custom ipsw firmware files. Download Custom Firmware (ipsw) For iPhone 3G Visit Site
http://www.blogsdna.com/3742/download-custom-ipsw-30-for-iphone-3g-2g-30-ipod-touch-30.htm

Download iPhone OS 3.1.3, 3.1.2, 3.1, Download iPhone OS 3.0. All iPhone iPSW files are listed below. You can download firmware for iPhone 4, 3GS, 3G, 2G and iPod Touch 3G, 2G, 1G Visit Site
http://www.iphoneheat.com/2009/03/download-iphone-firmware-files-all-at-one-place/

Step 3: Download Sn0wbreeze and the original iPhone OS 3.1.3 for your version of iPhone (download links Select the correct 3.1.3 firmware .ipsw file by clicking the Browse button. Visit Site
http://youtube.com/?v=P0kRZpXIgUk

OS 3.1.3 but GeoHot is showing to interest in updating BlackRa1n and BlackSn0w to jailbreak and unlock iPhone Related posts:Download iPhone OS 3.1.2 Custom Firmware (IPSW Files Visit Site
http://www.hack-the-iphone.com/?p=1010

You can jailbreak iPhone OS 3.1.2 by creating Custom IPSW file using PwnageTool. For now, PwnageTool is available for Mac only. So, only Mac users are able to create custom Visit Site
http://deejayshop.wordpress.com/2009/11/06/download-iphone-os-3-1-2-custom-firmware-ipsw-files-for-iphone-3gs-3g-2g/

All iPhone iPSW files (firmwares) are listed below. You can download firmware for iPhone 4, 3GS, 3G, 2G and iPod Touch 3G, 2G, 1G from the list Below. Visit Site
http://www.iphoneheat.com/2009/03/download-iphone-firmware-files-all-at-one-place/

iPod, iPhone and iPad Firmware Download. How to restore or update your iPod/iPhone/iPad: A file dialog will open and let you choose the downloaded ipsw-file. Visit Site
http://www.felixbruns.de/iPod/firmware/

This is not the same version which runs on the newly announced Apple iPad. To update to iPhone OS 3.1.3 Firmware, all you will have to do is to Visit Site
http://www.redmondpie.com/download-iphone-os-3.1.3-firmware-9140418/

Download Custom iPhone OS 3.1.2. Custom IPSW for iPhone OS 3.1.2. Download Custom OS You can jailbreak iPhone OS 3.1.2 by creating Custom IPSW file using PwnageTool. Visit Site
http://www.iphoneheat.com/2009/10/download-iphone-os-3-1-2-custom-firmware-ipsw-files-for-iphone-3gs-3g-2g/

To update to iPhone OS Firmware 3.1.2, all you will have to do is to connect your phone iPhone OS Firmware 3.1.2 zip file from the above link but i cant find the .ipsw file Visit Site
http://www.redmondpie.com/download-the-new-iphone-os-firmware-3.1.2-aga809/