Jailbreak OS 3.0 on iPhone 3G with redsn0w - need iTunes8.2 to start with

Why OS 3.0? Because there are 100 new features for the iPhone!

• Browse and download movies, TV shows and audiobooks from the iTunes Store**
• Stereo Bluetooth*
• Shake to shuffle
• New Voice Memos application*
• Cut, Copy & Paste with shake to undo
• Landscape keyboard in key applications
• Added search feature in Music, Videos, Mail, Calendar and Notes
• Spotlight search across iPod touch
• Improvements to Safari
- Performance
- HTML 5 support
- HTTP Streaming audio and video
- Auto-fill usernames and passwords
• Wi-Fi auto login
• Sync Notes with a Mac or PC via iTunes
• iTunes account creation and login**
• YouTube account login and access to subscriptions, ratings and favorites**
• More Parental Control options for Apps, Music, Movies and TV Shows
• New languages, dictionaries, and keyboards
• Enhanced Stocks application
• Support for CalDAV and subscriptions in Calendar
• Find my iPod touch and Remote Wipe via MobileMe (subscription required)**
• 1,000 new developer APIs, including:
- In App Purchases
- Apple Push Notification Service
- Accessories support
- Peer to Peer Connectivity
- Embedded Maps
- iPod Library Access
• Bug fixes

Take home message: using redsn0w, the jailbreaking is much smoother; however, the AptBackup is not working.

1. Update iTunes to 8.2
2. Download redsn0w from iphone-dev.org, check its sha1 value (0d58ff133461f3487a80200fe924741dd393b724) in the terminal

   $sha1 redsn0w-mac_0.7.2.zip

3. Backup iPhone and upgrade firmware to 3.0 ... (I did it because my previous jailbreaking experiences told me that I have to install the official version first, then jailbreak it)
4. Unzip the redsn0w, and run it:
   • Locate the firmware file at ~/Library/iTunes/iPhone Software Updates, mine is iPhone1,2_3.0_7A341_Restore.ipsw
   • Attach the iPhone with the mac then turn off the iPhone
   • Continue the steps: hold power button 3 seconds, add holding home button 10 seconds, release power button while holding home button 30 seconds.
   • After the iPhone reboots, the jailbreaking is done!
5. Load Cydia, which will take several minutes to reorganize something and I had an automatically reboot ...
6. In Cydia, install the following apt: Installous, MobileTerminal, NemusSync, OpenSSH, Rotation Inhibitor, SBSettings, VoIPover3G, xGPS. I noticed these ones are installed automatically: Hackulous Security, iPhone Firmware, sbsettingstoggles, and various repositories
7. Have fun with the 3.0 operation system for iPhone 3G.

So far, only one app has problem in the new system - WifiTrak, with the following error

The search function is faster than I expected, so is the copy-paste function.

All my previous data, including the ones in Cydia's apps, are kept during the firmware upgrade process.

Let's rock & roll!