The following step-by-step tutorial is going to show you how to convert ASF to iPhone 4S video using ASF to iPhone 4S Converter so that you can transfer ASF files to iPhone 4S and play ASF video on iPhone 4S.
Download and Install ASF to iPhone 4S Converter
Download the latest version of ASF to iPhone 4S Converter. Install and launch it.
Add ASF Files
Click the "Add Video" button to import the ASF file. Alternatively, you can click "File -> Add Video Files..." to add the ASF file. You can also batch import ASF files by clicking "File -> Batch Add Video Files".
Choose Output Format
From the "Profile" drop-down list, choose iPhone MPEG-4 Video as the output format.
Note: You can also adjust the audio/video parameters to customize a specific profile that best fits your needs. Click to learn how to customize profile.
Start Converting ASF to iPhone 4S
Click the "Start Encode" button to start to convert ASF to iPhone 4S.
Transfer Output to iPhone 4S
After you get the output files, launch your iTunes and transfer them to your library. Then you will be able to transfer the converted files to your iPhone 4S with the sync of iTunes.