Step 1: You need to have iTunes on your computer. If you don't download it for FREE from http://www.apple.com/itunes.
Step 2: iTunes will be automatically lauched after clicking the 'Download' button.If not please click "View in iTunes".
Step 3: Click "Free App" to download.
Step 4: Sync app with data cable and iTunes.
Send to Device
Step 1: Visit mobile9.com from your device and go to downloads.
Step 2: You can now start downloading file from your queue list.