The Apple iPhone 4 debuted on June 7, 2010 with an original price of $199 for the 16-gigabyte version and $299 for the 32-gigabyte version for new and existing AT&T customers. Without a contract, the 16-gigabyte version was $599 and the 32-gigabyte version was $699.
At the time of release the iPhone 4 ran Apple's iOS 4 operating system. The iPhone 4 has a 3.5-inch LED-backlit LCD capacitive touch screen with a resolution of 640 pixels by 960 pixels. The iPhone 4 has a one-gigahertz Cortex A8 processor with 512 megabytes of RAM. The iPhone 4 was released with 16 or 32 gigabytes of internal storage and has no microSD slot.