IPhone 4

Steve Jobs Headshot 2010

IPhone 4 cameras

Apple A4 Chip

IPhone 4 Mini-SIM Extracted

IPhone 4 Black

iPhone 4 is a smartphone that was designed and marketed by Apple Inc. It is the fourth generation of the iPhone lineup, succeeding the iPhone 3GS and preceding the iPhone 4S. The device was announced on June 7, 2010, at the Apple Worldwide Developers Conference (WWDC) and was released on June 24, 2010.

Design

The iPhone 4 introduced a new hardware design to the iPhone family, which Apple CEO Steve Jobs described as the thinnest smartphone in the world at the time of its release. It featured an all-stainless steel frame which doubles as an antenna, with front and back glass for the body. The iPhone 4 was the first model to introduce the high-resolution "Retina Display," with a pixel density of 326 pixels per inch, making text and images appear extremely crisp. The display uses LED backlit TFT LCD technology and has a size of 3.5 inches, with a resolution of 960 x 640 pixels.

Features

The iPhone 4 was powered by the Apple A4 chip, and it was the first iPhone to include a front-facing camera enabling video calls, which Apple branded as "FaceTime." The rear-facing camera was upgraded to 5 megapixels, with an LED flash, capable of recording HD video at 720p. It also introduced a micro-SIM card slot instead of a standard SIM card and featured a gyroscope for additional motion sensing capabilities.

Software

The device originally shipped with iOS 4, which introduced features such as multitasking, FaceTime, and iBooks. It also included the new iMovie app for iPhone, allowing users to edit videos on their phone. Over its lifespan, the iPhone 4 received multiple iOS updates, with iOS 7.1.2 being the final version supported.

Reception

The iPhone 4 received generally positive reviews for its design, display, and camera performance. However, it was not without controversy. Shortly after its release, users reported signal strength issues when holding the phone in a certain way, a problem that was referred to as "Antennagate." Apple addressed the issue by offering free cases to affected users and later by making hardware adjustments in subsequent models.

Legacy

The iPhone 4 is considered a significant milestone in the iPhone lineup, introducing features that would become standard in future models, such as the high-resolution Retina Display and FaceTime video calling. Its design also set the stage for future iPhone models, with the glass and aluminum body being refined and used in later generations.

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