iPhone 4

The iPhone 4 is the fourth generation of iPhone, and successor to the iPhone 3GS. Introduced on June 7, 2010 at the WWDC 2010 at the Moscone Center, San Francisco, it is the first device to support FaceTime. 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.

The device will be available from June 24, 2010 in the U.S. and is available exclusively from AT&T. It will be available SIM free in certain countries.

The iPhone has all the features associated with an iPhone; only major changes from the iPhone 3GS are listed below. The most noticeable difference is a new industrial design. The primary structure is a stainless steel frame, which additionally acts as both antennae. The internal components of the device are situated between two panels of chemically strengthened aluminosilicate glass. Other changes include Apple's A4 processor, a higher resolution display, and FaceTime video calling.

The iPhone 4 was made available for pre-order on June 15, 2010. Customers attempting to pre-order the iPhone 4 reported problems with the pre-order process on the U.S. and U.K. online Apple Stores which crashed due to the surge in traffic. The same issue was reported with AT&T and SoftBank, who suspended advance sales of the iPhone 4 as demand threatened to exceed supply. Retail stores were also unable to complete pre-order transactions due to the servers crashing.

Apple and its partner carriers received 600,000 pre-orders for the iPhone 4 in the first 24 hours, the largest number of pre-orders Apple has received in a single day for any device. Engadgetreported that at 20:30 UTC, all iPhone 4 pre-order suppliers had sold out.