As you know Apple dropped iOS 4.0.1 for iPhone 3G, iPhone 3GS and iPhone 4 in response to wrong signal calculation. This is a minor update and no major changes in baseband update and jailbreak protection, at least for iPhone 3G. We already posted a complete how to guide on how to Jailbreak iOS 4.0.1 for iPhone 3G with Redsn0w. Following are the instructions to unlock iPhone 3G with iOS 4.0.1
Note : Ultrasn0w is being updated to fix Mobilesubstrate issue, hold for a little while. 

Instructions to install ultrasn0w using cydia

Step …

MuscleNerd released a new version of ultrasn0w 0.92 with carrier logo fix.  Last ultrasn0w has a issue with the logo of the carrier that did not appear regularly after the unlock. Earlier today Musclenerd asked beta tester to test ultrasn0w 0.92 on his personal repo. Now, however, the DevTeam has released the new update in the official repositories. FYI that ultrasn0w may be used only to unlock iPhone 3G/3GS with baseband 4.26.08, and all those who have the new version 05.11.07 be used blacksn0w of GeoHot.
                                      
If you have …

These are instructions on how to software unlock the iPhone 3GS with OS 3.0 for use with any GSM cell phone carrier. Before you can follow these instructions you must have a jailbroken iPhone if you haven’t jailbreaked your iPhone 3G then follow our Guide on How to Jailbreak iPhone 3G on OS 3.1 Pwnage Tool (Mac) For unlocking your iPhone UltraSn0w, a soft unlock payload from iPhone Dev Team is using. UltraSn0w is a small daemon that is launched on boot.  It injects the payload at boot and also …

Recently i got some comments from my readers that they have no WiFi connection on there home, and someone says his iPhone is not able to detect WiFi signals (maybe hardware problem) and some complaints about crashing Cydia problem so they are not able to unlock their iPhone 3G on OS 3.0. In order to activate those phone i mailed them two files extracted from my Ultrasn0wed iPhone and directed them where to put those file with DiskAid. The procedure was little bit long and not easy for peoples, who …

As promised Musclenerd showcased the next version of QuickPwn and UltraSn0w. Yes UltraSn0w replaced the YellowSn0w for iPhone 2G, 3G with OS 3.0 DevTeam will release UltraSn0w for iPhone 3G on iPhone OS 3.0 firmware with baseband 04.26.08 on Friday. For unlocking your iPhone 3G with UltraSn0w it doesn’t matter which baseband or bootloader your firmware is running on. Now iPhone 3G is unlocked up to the latest Baseband. Now you needn’t to follow those lengthy procedures to downgrade baseband but limited to Bootloader 5.08 Downgrade iPhone 3G Baseband from …