Apple has started selling unlocked iPhone 4 models on their website without a contract.
iPhone 4
features a 5-megapixel camera with LED flash, HD video recording,
Apple's A4 chip, a 3-axis gyro, GPS, Wi-Fi, Bluetooth, and a
high-resolution 940 x 640-pixel (326 pixels per square inch) retina
touchscreen. iPhone 4 runs iOS 4.3, which includes multitasking, folders, Game Center, hotspot mode, and AirPlay
and AirPrint wireless printing.
Unlocked GSM iPhone 4 smartphones do not come with a micro SIM card, so you'll need an active
micro SIM card from any supported GSM carrier worldwide.
It comes with Apple earphones with remote/mic, Dock Connector to USB Cable, USB Power Adapter and SIM eject tool. The unlocked iPhone 4 smartphones costs $649 for 16GB and $749 for 32GB.