Sideload apps: Follow developer instructions to add to your phone. Not common. Risky: Jailbreak an iOS device and load apps to it. This article explains how to get apps that are not in the App Store ...
If you’ve upgraded to 3.1 firmware, you’ll need to wait for the Dev-Team release of Redsn0w or Pwnage Tool for iPhone 3GS firmware 3.1. Don’t try this if you’ve upgraded to 3.1! Redsn0w just makes ...