The famous Cydia app Activator has been updated to work with the iPhone iOS 4. For those who don’t know: Activator is an app which allows you to launch different Cydia apps and do number of system actions with simple on-screen gestures. The previous version (v3.1.2) of Activator was having some issues with iOS 4 as it was causing the SpringBorad to crash on certain gestures.

iPhone 4 signal reception issue has caught the attention of media and users enormously! AppleInsider has reported that Apple is working on an updated version of iOS 4 named “iOS 4.0.1″ to address iPhone 4 signal reception issue via software fix. There are no official words form Apple regarding iOS 4.0.1, but some readers have reported that Apple’s tech support forums originally confirmed that iOS 4.0.1 software fix is coming soon, later those comments were deliberately removed by Apple for some unknown reasons.

Destructor95 has released the new version of ToolJail i-e ToolJail v2.2 which provides you with the latest step-by-step guides on jailbreaking and unlocking the latest iOS 4 on iPhone 2G, 3G & 3GS and iPod Touch 2G & 3G. For those who don’t know ToolJail is created to help the novice iPhone and iPod Touch users to want to jailbreak their iDevices without messing their head in thousands of tutorial available online.

I just managed to jailbreak iOS 4.0 on iPhone 3G. I have both Windows and Mac, so i created two custom IPSW files by using S0wbreeze 1.6 and PwnageTool 4.0. As soon as i tried to restore the IPSW file through iTunes to my iPhone 3G i got number of 16xx (1600, 1601, 1602, 1603, 1604) errors. Below is a solution that worked for me!

TinyUmbrella 4 has been released by Notcom which allows you to save SHSH blobs of latest iOS 4.0 final version on iPhone 3GS, iPod Touch 2G & 3G. iPhone 3G users don’t need to save their SHSH blobs. TinyUmbrella 4 is available for Windows, Mac and Linux. TinyUmbrella 4 is a unified version of TinyTSS and FirmwareUmbrella.

Those who want to downgrade last iOS 4.0 final or GM (Gold Master) edition to iPhone OS 3.1.3 then follow our step-by-step guide below. Inorder to downgrade your iPhone 3GS and iPod Touch 3G to firmware 3.1.3, you must have saved your SHSH blobs on Saurik’s server in order to do a successful downgrade. If you haven’t saved your SHSH blobs on Saurik’s server when you were on OS 3.1.3 then you are out of luck. All iPhone 3G users can directly follow the guide below to downgrade from iOS 4.0 to iPhone OS 3.1.3.

iH8sn0w has released Sn0wbreeze 1.6.1, an updated version of Sn0wbreeze 1.6 which fixes Resources.zip issues. Just like the last release, Sn0wbreeze 1.6.1 is capable of jailbreaking iOS 4.0 on iPhone 3G, 3GS and iPod Touch 2G. Sn0wbreeze is a PwnageTool port to Windows which creates a custom IPSW file for your iDevice. You can restore that custom IPSW file to your iDevice by using iTunes to jailbreak it.

All iPhone 3G, 3GS and iPod Touch users can now jailbreak iOS 4.0 while preserving their baseband version. iH8sn0w, the infamous iPhone hacker behind f0recast and iReb has released Sn0wbreeze 1.6 which jailbreaks iOS 4.0 on all iPhone 3G, iPhone 3GS and iPod Touch 2G on Windows.

iH8sn0w recently released Sn0wbreeze 1.6 which allows you to jailbreak iOS 4.0 on iPhone 3G (old bootrom + non-Spirit jailbreak), iPhone 3G and iPod Toch 2G (non-MC models) on Windows by creating custom IPSW file which can be easily restored on your phone by using iTunes. The following step-by-step guide will explain how you can use Sn0wbreeze 1.6 to jailbreak your iPhone 3G, 3GS and iPod Touch 2G.

iH8sn0w has released Sn0wbreeze 1.6 which will allow you to jailbreak iPhone 3G, iPhone 3GS and iPod Touch 2G running iOS 4.0 on Windows. For those who don’t know Sn0wbreeze is a port of PwnageTool on Windows through which you can jailbreak your iPhones and iPod Touches without upgrading your baseband. Just like PwnageTool, Sn0wbreeze will create a custom IPSW file for your device which you can restore using iTunes on Windows.