iPhone 4 series

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.

DETAILED SPECIFICATIONS

GENERAL
Release date October 2011
Form factor Touchscreen
Dimensions (mm) 115.20 x 58.66 x 9.30
Weight (g) 140.00
Battery capacity (mAh) 1430
Removable battery No
Colours Black, White
SAR value NA

 

DISPLAY
Screen size (inches) 3.50
Touchscreen Yes
Resolution 640×960 pixels
Pixels per inch (PPI) 326

 

HARDWARE
Processor 800MHz  dual-core
RAM 512MB
Internal storage 16GB

 

CAMERA
Rear camera 8-megapixel
Flash Yes
Front camera 0.3-megapixel

 

SOFTWARE
Operating System iOS 6.1.3

 

CONNECTIVITY
Wi-Fi Yes
Wi-Fi standards supported NA
GPS Yes
Bluetooth Yes, v 4.00
NFC No
Infrared No
USB OTG No
Headphones No
FM No
SIM Type Micro-SIM
GSM/ CDMA GSM
3G Yes
4G/ LTE No

 

SENSORS
Compass/ Magnetometer Yes
Proximity sensor Yes
Accelerometer Yes
Ambient light sensor Yes
Gyroscope Yes
Barometer No
Temperature sensor No

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