Unlock iPhone 3.0 and Tethering Howto

How to unlock iPhone 3g OS 3.0
1. update to firmware 3.0 in itunes
2. Download and Run redsn0w (find it through google search), make sure NOT to mark to install Icy
3. Add repo666.ultrasn0w.com in Cydia
4. Search for ultrasn0w, install it and reboot

How to enable tethering (use your iPhone’s Internet connection on your laptop)
1. Download config file at http://www.iphone-notes.de/mobileconfig/
2. Send yourself an email with the config file, open the email on your iPhone and click on the config file
3. Reboot and find the tethering option in your Network settings