It was only a few days ago that we brought you the exciting news that iPhone Dev Team and their rock star lead MuscleNerd had been working covertly on a way to allow users to downgrade the baseband on their iPhone 3G and 3GS from 06.15.00 to a prior one with full unlock and GPS support. This may not be something which some of you actually require, but for those unfortunate ones who had to update to the iPad baseband to get an unlock last year, it is certainly a nice welcome, especially with the launch of Apple’s new Maps service in iOS 6 that makes extensive use of the device’s GPS capabilities.

Last year, company by the name of CutYourSim caused a mixture of excitement, confusion, and subsequent disappointment and cynicism when it released a permanent unlock procedure – only for the service to be abruptly halted once Apple caught wind of what was occurring.

The iPhone Dev Team today has released an updated version of Ultrasn0w unlock to make it compatible with iOS 4.3.2 on iPhone 4 and 3GS, running on the old baseband.

The newly released Sn0wbreeze 2.4 supports Ultrasn0w unlock for iPhone 4 and 3GS users (old basebands only) which otherwise happens to be broken on the latest iOS 4.3.1 firmware.

As we reported earlier, both PwnageTool 4.2 for Mac and Sn0wbreeze 2.2 for Windows are now available which can preserve baseband, and jailbreak iPhone, iPad and iPod touch on iOS 4.2.1 firmware.

The recently released PwnageTool / Redsn0w jailbreak tools for iOS 4.2.1 requires you to transfer iPad’s 3.2.2 baseband to your iPhone 3GS & 3G in order to unlock it using Ultrasn0w 1.2. This has resulted in poor battery performance as has been experienced by many users. Some users have also complained about their device becoming very hot when in use.

Redsn0w 0.9.6b5 has just been released which can jailbreak and update iPhone 3GS & 3G baseband to 06.15.00 so that it can be unlocked using the newly released Ultrasn0w 1.2.

As promised, the iPhone Dev-Team has released the necessary carrier unlocking tools which can unlock the latest iOS 4.2.1 firmware on iPhone 3GS and 3G on basebands later than 05.13.04. Since iPhone 4 has different baseband OS, It’ll take a little while longer for the Dev Team to unlock it on the latest firmware.

In a reply to one of his many followers on Twitter, MuscleNerd of iPhone Dev Team has confirmed that ultrasn0w unlock for iPhone 3GS and iPhone 3G on iOS 4.1 and iOS 4.2, with 05.14.02 baseband will be released in a day or two at most, once iOS 4.2 is released to public.

Last week, we published a post where we told you that the unlock for iPhone 3GS with the latest 05.14.02 baseband was currently not being worked on as both the Chronic and iPhone Dev teams were focusing on iOS 4.1 jailbreak (based on SHAtter exploit). With respect to that, we’d like to present a piece of good news to our readers: that of an 05.14.02 baseband exploit!

The newly released iOS 4.1 for iPhone 4, 3GS, and 3G features new baseband which is currently not unlockable using the current version of ultrasn0w. But if you upgrade (while preserving baseband) and then jailbreak iPhone 3GS on iOS 4.1 using PwnageTool method posted here, you can unlock your phone (iPhone 3GS) using the existing version of ultrasn0w. Also, if you upgrade your iPhone 4 (while preserving baseband) on iOS 4.1 using the method posted here, you will be able to unlock your phone (iPhone 4) as soon as the new jailbreak tool is available for download.

The much awaited all iOS device jailbreak was released earlier today. Dubbed as JailbreakMe 2.0 Star, this tool which runs right under iOS’ Safari browser can jailbreak iPhone 4, 3GS, 3G, iPod touch 3G / 2G and iPad. Once you are done with the jailbreak, you must be wondering what about the unlock? Well, iPhone 3GS and 3G users can unlock their jailbroken devices right now on iOS 4.0.1 / 4.0 on any baseband with existing version of Ultrasn0w. Simply follow the step by step guide posted here to unlock your iPhone so that you can use it with any carrier you like. It is supported on all basebands upto 05.13.04.