How to Upgrade iPhone from iOS4 or iOS4.01 to iOS4.1

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If you need to upgrade from iOS4 or iOS4.01 to iOS4.1, here are the steps you may wanna follow.

Assumption:
Pwnage tool will be out soon

Steps:
1. Install PKGBackup. This will help you to backup Cydia Apps.
2. Install SB Organizer. This in combination with PKGBackup will save your Springboard layout.
3. Run PkgBackup to do a backup of your Cydia Apps.
4. Open iTunes, right click your iPhone under devices and select "backup". This will backup your iPhone
5. (Optional) If you do not want to upgrade your baseband, you can use TinyUmbrella in combination with iTunes to restore to 4.1
6. Go on to upgrade to iOS4.1
7. Do a iTunes sync
8. Download, install and Run limera1n
9. Install PkgBackup to restore back your jailbroken apps.