Both iPhone 4 and Samsung Vibrant are quad-band world phones packed with all the bells and whistles that you would want a smartphone to have. Both phones are equipped with Bluetooth, Wi-Fi and 3G connectivity as well as GPS features. Both phones allow you to sync your phone contacts with those in your Facebook, Outlook, and Gmail accounts. Both also support Gmail, POP3, IMAP and Exchange accounts and offer a unified email inbox as well as robust calendar functions. Both smartphones also support in-app email functionality, allowing you to send notes via email or SMS for instance.
Looking into one important feature of both smartphones, interestingly both excel in this department - multimedia handling capability. Both the Samsing Vibrant and iPhone 4 are great multimedia devices for gaming and audio and video playback. One thing that the iPhone 4 edges out the Samsung Vibrant on, is of course the iTunes store for movies and videos. Eventually, Samsung will come up with similar services. Until then, the iPhone 4 one ups the Samsung Vibrant in this department.
In the camera department, both iPhone 4 and Samsung Vibrant sport the same 5 megapixel camera. Both are capable of capturing high-resolution photos as well as HD videos. One difference between their camera feature is the lack of flash for the Samsung Vibrant. But then this is compensated for by the presence of various editing options which you can apply to your photos. These include ISO settings, blink and smile detection, and a panorama mode.