iPhone 4 is the fourth generation of iPhone, and successor to the iPhone 3GS. It is the first device to support FaceTime, Apple's video calling application. It has an Apple A4 processor, 512 MB of eDRAM, a 3.5 inches (89 mm) LED backlit liquid crystal display with 960-by-640 pixel resolution, and the iOS 4 operating system.
As we know, Apple iPhone 4 only supports MP4, MOV, M4V video formats (H.264, MPEG-4 video codec).Then how to convert video to iPhone 4 and watch video on iPhone 4 freely? Here, you will find a quick and effective solution to convert videos to iPhone 4 on Windows (Windows 7 compatible) in 3 steps.
Now free download Cucusoft iPhone Video Converter Suite which is the best Video to iPhone 4 Converter onto your PC. Install then running it first.
Step 1: Launch
Choose the Video to iPhone Converter by clicking the second icon and then import videos to it by clicking "'Open file".

Step 2: Output Settings
The default output format is iPhone 480*320 Mpeg-4 video. If you'd like to change this, click "Profile" button, set the output format to iPhone 480*320 mpeg4 video, iPhone MP4 video, iPhone h264 video or iPhone audio (MP3). Here, you can also set video size, frame rate and more.

Step 3: Start Conversion
Hit 'Convert' button to start converting video to iPhone 4. That's all.
Step 4: Transfer Video to iPhone 4
Connect your Apple iPhone 4 to PC and sync converted video to iPhone with Apple iTunes. Done!
With 3 steps you can convert video to iPhone 4 supported video formats. So why not free download the program to enjoy watching videos with your iPhone 4 anytime and anywhere!
More: Convert AVI to iPhone 4, Convert MKV to iPhone 4, Convert WMV to iPhone 4