Apple has just announced iOS 4.1 final version for iPhone 4, 3GS, 3G and iPod Touch devices. iOS 4.1 will feature HDR(High Dynamic Range) photos, HD video uploads over Wifi and Game Center for end users. Moreover iOS 4.1 comes with a fix for bugs in proximity center, Bluetooth and iPhone 3G performance issues.

The famous multitasking app for iPhone and iPad has been released for iOS 4 based devices and is available for download via Cydia. Previously Multifl0w was compatible with iPhone 3G and iPhone 3GS running iPhone OS 3.1.x but now thanks to @aaronash who completely rewrote the code of Multifl0w to make it compatible with all jailbroken iPhones and iPads running iOS 4 and iOS 3.2.

All of us know that iOS 4 and iPhone 3G hasn’t been a successful combination! iPhone 3G performance on iOS4 has been utterly disappointing. Numerous issues have been reported by iPhone 3G users, the most common is slow / delayed response of applications. It looks like Apple at last has decided to look into this and bring a fix in next software update.

If you have an iPhone 3G on iOS 4 and you are trying to turn on / off iOS 4 features on your phone then zToggle is the right application for that. It allows you to toggle iOS 4 functions like Multitasking and Springboard Wallpapers right away. You don’t need to re-jailbreak your device with Redsn0w or PwnageTool.

iH8sn0w [@iH8sn0w], the iPhone hacker behind famous tools like BlackBreeze, F0recast & Sn0wbreeze, has jailbreaked iOS 4.0.2 on iPhone 3GS (Old bootrom) with Sn0wbreeze v2.0 which is yet to be released. For those who don’t know, Sn0wbreeze is a PwngaeTool port on Windows OS which creates custom cooked IPSW file which can be easily restored through iTunes to jailbreak the device.

According to Sherif Hashim (@sherif_hashim), the famous iPhone baseband hacker, iOS 4.0.2 do not upgrade your iPhone’s baseband and hence you can unlock your iPhone on iOS 4.0.2 with the latest version of Ultrasn0w. So far Redsn0w(v0.9.5b5-5) can jailbreak iOS 4.0.2 on iPhone 3G and iPod Touch 2G(non-MC models), so you can only unlock iPhone 3G with Ultrasn0w 1.1-1.

According to iPhone Dev Team, you can still jailbreak iOS 4.0.2 on iPhone 3G and iPod Touch 2G(non-MC models) with Redsn0w 0.9.5b5-5. As Apple has fixed the PDF exploit in iOS 4.0.2 and iOS 3.2.2 so you cannot jailbreak your device by JailbreakMe once its upgraded to the latest firmware releases. To jailbreak your iPhone 3G or iPod Touch 2G(non-MC models) with Redsn0w, follow the step-by-step guide below.

Apple has finally fixed the PDF exploit used by Comex in JailbreakMe by releasing iOS 4.0.2 for iPhone 4, 3GS, 3G and iPod Touch 2G & 3G. This update will not upgrade your baseband version but still upgrading your iPhone or iPod Touch to iOS 4.0.2 will leave your device in an unlocked state as there is no official tool available yet which can jailbreak and unlock devices running iOS 4.0.2.

iPhone Dev Team has released Ultrasn0w v1.1-1, an update to Ultrasn0w v1.0-1. iPhone Dev Team has tweaked few things which will ensure better battery life, performance and more stability on all iPhone 4 devices. Like the previous release, Ultrasn0w v1.1-1 can unlock iPhone 4 running iOS 4.0 / 4.0.1 with 01.59.00 baseband and iPhone 3G, 3GS with 04.26.08, 05.11.07, 05.12.01 or 05.13.04 baseband version.

As promised, iPhone Dev Team has released their much awaited version of Ultrasn0w (v1.0-1) which can unlock iPhone 4 running iOS 4.0 / 4.0.1 with 01.59.00 baseband and iPhone 3G, 3GS with 04.26.08, 05.11.07, 05.12.01 or 05.13.04 baseband version. Once you have jailbreaked your iPhone by using JailbreakMe, you can follow the step-by-step procedure below to unlock your iPhone 4, 3GS, 3G.