You can also upload IOS baseband to release 4.1 to 15.6.1900

Many people are following the tutorial that we issued this morning with IOS 4.1, 4.2.1 iOS place, creating an untethered on iPhone 3G jailbreak with new bootrom, the process is exactly the same, just that when you select the firmware iOS select your iPhone 4.1

Please note only recommend this tutorial to people who have the iPhone in a drawer for updating and release need to use it, do so at your own risk, modify the baseband, which has no reverse gear and is easily detectable by Apple, plus from now on you will fail every time you want to upgrade to an official firmware, you can only upgrade to custom firmware.

Do not do this process in an iPhone 4 or run the risk of spoiling. SOLO FOR 3G IPHONE 3G

Said this started:

If you have one of the following baseband do not need this process, just install Cydia ultrasn0w:

04.26.08

05.11.07

05.12.01

05.13.04

06.15.00

Only if you need it:

05.14

05.15

0.9.6b5 Redsn0w need, download it here .

Download 3.2.2 IPSW iPad clicking here .

IPSW and 4.1 of your iPhone, download it here .

The rest of the tutorial is here.