well jailbroken iphones can run apps that do things non jailbroken phones cant do due to at&t and apple restrictions etc.
For example. The iphone blocks you from downloading anything over 10mb’s unless you have wifi or are hooked to a computer. There is a free app you can run on jailbroken phones that causes your phone to bypass that restriction so you can downlaod podcasts, apps etc thats over 10mb over 3g signals as well. comes in handy especially for podcasts.
Theres an app for jailbroken phones that allows you to use your phone as a wireless modem. Super easy and with a click any iphone connected to a laptop can surf the web over 3g. Of course for these you want to have an unlimited data plan but you dont have to have one. Also there the nes, genesis emulators… you can do SSH from your jailbroken phone which is good for rebooting, fixing servers remotely LOL trust me.
Basically theres a whole “store” of mostly free apps you get access to when you jailbreak your phone.
