เราสามารถใช้ redsn0w v0.8 ในการjailbreak 3.0.1 ได้ครับ
ก็ อัพ3.0.1 ผ่าน iTuneได้เลย แล้วRun redsn0w v0.8 (แต่เวลาโปรแกรมมันถามหา IPSW ให้ไปเลือก3.0) หลังจากjail เสร็จก็ใช้ ultrasn0w 0.9 ได้สำหรับคนที่ต้องการทำ Unlock

The Fuzzyband Baseband downgrader has been updated to 3.1b1 and now supports iPhone OS 3.0. It also adds an upgrade feature for those looking to use the ultrasn0w unlock.

FEATURES:
Upgrades / Downgrades baseband to 4.26.08 for unlocking with the ultrasn0w tool released by the iPhone Dev-Team

UPGRADING:
Upgrading is for users that wish to remain on 2.2.1 but also unlock. Upgrading will put the 4.26.08 baseband from 3.0 on the modem so that ultrasn0w may be installed from cydia

DOWNGRADING:
Downgrading works from any version greater than 4.26.08 (currently 5.08.01 is the newest version available, found in 3.1 beta 1). It will put your baseband back at version 4.26.08 which is the current unlockable version by ultrasn0w.

Downgrading only works on phones that have the 05.08 (5.8) Bootloader from the factory. This is a very limited number of phones that were released in the first few weeks of the 3G production cycle.

If you do not know your bootloader then you can run Fuzzyband and it will report the version number for you.

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i’m going to sleep…partying this weekend…maybe monday for os x and win 7

purplera1n

เพิ่มเติ่ม ติดตาม นี่เลย

I make it ra1n

Yes, this is what you’ve all been waiting for. A jailbreak for the iPhone 3GS. And it’s awesome. To get started right now, go to purplera1n.com. Download it. Make sure you have windows(but not 7), the latest iTunes installed, and an iPhone 3GS with 3.0 firmware. Connect your iPhone normally. Click “make it ra1n”. Wait. On bootup, run Freeze, the purplera1n installer app. Hopefully you’ll figure out what to do from there. Best tutorial gets linked to from purplera1n site. This tool is beta. Make sure to have everything backed up before running. Also if Cydia doesn’t show up after running Freeze, reboot.

If you need help email purplera1n.support at gmail and attach your purplera1n.log file. Or call the purplera1n support hotline @ (650) 265-1210 Mac version is coming shortly.

Normally I don’t make tools for the general public, and rather wait for the dev team to do it. But guys, whats up with waiting until 3.1? That isn’t how the game is played. We release, Apple fixes, we find new holes. It isn’t worth waiting because you might have the “last” hole in the iPhone. What last hole…this isn’t golf. I’ll find a new one next week. Also your purplera1nyday files ensure that you can always get back to a jailbroken state, so if you have it it’s just a matter of tools.

Props to chronic dev for their help, and to kroo for writing v2 of Freeze. And props to Saurik for making an awesome package set. Note the binary size of purplera1n, it’s smaller than C++ hello world. No 20MB thing that needs to be torrented. And no IPSW to download. This is how jailbreak should be!

Credit: iclarified