not to encourage, but You simply jailbreak the iphone, once you have Cydia - then find read up on installous (which is a pirate version of the appstore) works u

not to encourage, but You simply jailbreak the iphone, once you have Cydia - then find read up on installous (which is a pirate version of the appstore) works up to 3.0 and had 90% of the most popular apps.