CAUTION CAUTION CAUTION CAUTION : Please leave a comment if you don’t know what you are doing. Better safe than sorry. You are warned, now proceed!
iPhone 2G, 3G, 3GS users can now safely update to 3.1.3 firmware without updating the baseband (for unlock). If you are not the one to download all the various files and just want the ultimate result, these files are waiting for you to download! If you rather want to start from scratch, download Pwnage 3.1.5 tool for Mac.

Caution #1 : A restore is going to wipe the …

iPhone 2G, 3G, 3GS users can now safely update to 3.1.2 firmware without updating the baseband (for unlock). If you are not the one to download all the various files and just want the ultimate result, these files are waiting for you to download! If you rather want to start from scratch, download Pwnage 3.1.4 tool for Mac.

Caution #1 : A restore is going to wipe the iPhone clean. Hence, please backup your iPhone using iTunes and then proceed.

More info about these custom firmware files :

Has factory boot logos …

[img source : Apple.com]
iPhone 3GS users can now safely update to 3.1 firmware without updating the baseband (for unlock). If you are not the one to download all the various files and just want the ultimate result, these files are waiting for you to download! If you rather want to start from scratch, download Pwnage 3.1.3 tool for Mac.

Caution #1 : Please proceed further ONLY if you have an iPhone 3GS. iPhone 2G or 3G owners should follow this guide instead.
Caution #2 : A restore is going to wipe the …

If you get a 1600 or 16xx error while trying to restore to a custom 3.1 firmware for iPhone 2G or 3G, try the following :

Try rebooting both iPhone and PC/Mac.
Make sure the iPhone is in DFU mode.
On a Mac – BEFORE creating the custom ipsw, delete restore files found in ~/Library/iTunes/Device Support
On a PC – Delete device support files (restore files) in iTunes folder in the following locations
Windows 7 and Vista : C:/*UsersName*/AppData/Roaming/Apple Computer/iTunesDevice Support
Windows XP : C:/Documents and Settings/*UserName*/Application Data/Apple Computer/iTunes/Device Support
Try restoring to the custom firmware via iTunes by (shift+restore …

UPDATE : A new version of custom firmware 3.1.2 for iPhone 2G/3G/3GS is now available here!
UPDATE : If you get a 1600 error while trying to restore to a custom firmware here, try this.
iPhone 2G and 3G users can now safely update to 3.1 firmware without updating the baseband (for unlock). If you are not the one to download all the various files and just want the ultimate result, these files are waiting for you to download! If you rather want to start from scratch, download Pwnage 3.1 tool for …

UPDATE : A new version of custom firmware 3.1 for iPhone 2G/3G/3GS is now available here!
Free your iPhone 3G 3.0 from Apple’s chain by jailbreaking your iPhone which provides you with various customization features and even unlock feature which Apple and your official carrier hate! There are various options available to achieve this level of customization on your iPhone such as download firmware files, bootloader files, jailbreak/unlock tools such as Redsn0w/Pwnage or QuickPwn.

If you are not the one to download all the various files and just want the ultimate result, …

Note : If you are planning on using Gevey SIM, please take a quick peek at this marathon race into chasing the mystery behind Pwned iPhone 3G 2.2 and Gevey SIM issues.
This custom pwned firmware version 2.2 has the older Baseband, Factory default logos (No Pwnapple at boot!) , Pre-activated for non-ATT users, Root Partition size 1000 MB, Cydia and Installer as a bonus to make life simple!

Recommended Steps :
Pwn your iPhone 3G when at firmware version 2.1 using QuickPwn 2.2 either using Windows or Mac(STRICTLY REQUIRED)
Now, download this Custom …