Apple iPhone 4 iOS smartphone

iPhone 4 is the 4th generation of iPhone, which is the successor to the Apple iPhone 3GS smartphone. The iPhone 4 GSM version was announced in June, 2010. The smartphone was available exclusively through AT&T in the United States. While the iPhone 4 CDMA version was announced in January, 2011. At that time Verizon had reached an agreement with Apple and would begin selling a CDMA iPhone 4 in the U.S., ending Apple's exclusivity agreement with AT&T.

Apple iPhone 4 is powered by a single-core Apple A4 chipset, which like all previous iPhone models, manufactured by Samsung. This system-on-a-chip is composed of an ARM Cortex-A8 CPU integrated with a PowerVR SGX 535 GPU. The GSM-equipped and CDMA-equipped iPhone 4 smartphones are identical in appearance. However, aside from the different radios, the GSM and CDMA model have also some differences in features such as call waiting, conference calls, call forwarding, dialing hard pauses, and placing a call on hold.

Apple iPhone 4 boasts a 5 megapixel camera with LED flash, HD video recording. It comes with iOS 4 which features Multitasking, Folders, enhanced Mail, deeper Enterprise support and Apple’s new iAd mobile advertising platform. iPhone 4 also offers 802.11n Wi-Fi networking and adds quad-band HSUPA to provide 7.2Mbps downlink and 5.8Mbps uplink capability. Apple's 3.5-inch Retina display has 960 x 640 pixels—four times as many pixels as the iPhone 3GS and 78 percent of the pixels on an iPad. For more specific info about Apple iPhone 4, there is a table of specification with more detailed information on the Apple iPhone 4 GSM Specs or Apple iPhone 4 CDMA Specs.