Can't Install App on iPhone

Since upgraded to iTunes 8, I have problem syncing my applications with my iPhone. Not sure whether the problem does occur in iTunes 7 though.

Anyway the problem I had was "The application "abc" was not installed on the "Jon's iPhone" because you are not authorized for it on this computer."

The solution is very simple: Go to your iTunes, and at the top menu bar where the File, Edit, View etc. is, click Store > Authorize Computer...

A small window will pop-up and will request you to enter your Apple ID and password for verification purposes. Once you sign in, it will take a few seconds to access into iTunes Store and authorize your computer. You should be able to sync your apps with your iPhone after that.

Hope it helps!

And yes, keeTz might be interested to see this:[spoiler]

A total of 371 iPhone 2.0 applications nyahahaha!
[/spoiler]