Apple iPhone 4 smartphone was launched in June 2010. The phone comes with a 3.50-inch touchscreen display with a resolution of 640 pixels by 960 pixels at a PPI of 326 pixels per inch. Apple went with optical lamination and an inter-plane switching (ISP) panel with light-emitting diode (LED) backlighting that made images look as if they were painted just beneath the glass, and greatly improved the viewing angle. Moreover, instead of matching competing display sizes of the time, they leap-frogged over them. To boost pixel count yet maintain compatibility with existing apps, Apple doubled both horizontal and vertical counts, while keeping the physical size constant at 3.5-inches. They went from 480×320 to 960×640. That brought the density up from 163ppi to 326ppi, and Apple made the argument that, at that point, the pixels disappeared. They called it a Retina display.
The Apple iPhone 4 comes with 512MB of RAM. The phone packed 8GB of internal storage cannot be expanded. As far as the cameras are concerned, the Apple iPhone 4 packe a 5-megapixel primary camera on the rear and a 0.3-megapixel front shooter for selfies.
The Apple iPhone 4 runs iOS 6.1.3 and is powered by a 1420mAh non removable battery. It measures 115.20 x 59.00 x 9.30 (height x width x thickness) and weighs 137.00 grams.
The Apple iPhone 4 is a single SIM (GSM) smartphone that accepts a Micro-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth. Sensors on the phone include Proximity sensor, Ambient light sensor, Accelerometer, and Gyroscope. Apple added a 3-axis gyroscope to the iPhone 4, with pitch, roll, and yaw, as well as rotation around gravity. Working together they provided 6-axis motion detection. It was a huge leap forward when it came to precision control, especially for gaming.
The iPhone 4 launched on June 15, 2010. It would hit 88 countries and 185 carriers by the end of the year. Apple also launched iOS 4 along with it. Despite an initial rollout of only 5 countries, and considerable supply constraint, they still sold 1.7 million that first weekend.
The competitive market saw BlackBerry and Microsoft continue to struggle in the dark, Palm continue to struggle in the light, and Google’s Android continue to come on like a freight train.
|Release date||October 2011|
|Dimensions (mm)||115.20 x 58.66 x 9.30|
|Battery capacity (mAh)||1430|
|Screen size (inches)||3.50|
|Pixels per inch (PPI)||326|
|Operating System||iOS 6.1.3|
|Wi-Fi standards supported||NA|
|Bluetooth||Yes, v 4.00|
|Ambient light sensor||Yes|