Processor: Samsung Exynos 4 Quad, Qualcomm Snapdragon S4 MSM8960, or Qualcomm Snapdragon 400 MSM8228.The ' premium suite upgrade' delivered by Samsung through the update to Android 4.1 later the year retrofitted the split-screen feature from the Galaxy Note 2, allowing two apps on screen simultaneously. No megapixel label is present like on the predecessor. The front camera's video resolution has increased from 480p to 720p. Like its predecessor, its rear camera has eight megapixels (3264×2448) and 1080p video recording, though the S3 adds stereo audio recording, as well as the ability to simultaneously capture 6 megapixel (3264×1836) photos while filming, which is the image sensor's highest 16:9 aspect ratio crop. The Galaxy S III is the first Samsung mobile phone with wireless charging support that can be enabled using a special back cover that connects to dedicated pins under the rear cover.

It features a split-screen feature whereby users can use two apps simultaneously (available from Android 4.1 up to 4.4.2 'Premium Suite Upgrade'), an upgraded video player software which is first able to play in a movable and resizeable pop-up window for simultaneous watching during other tasks, and with motion thumbnails that can preview playing videos rather than only a static image, an 'Ambient Light' feature whereby the screen brightness can automatically adjust to the light level, a 'Smart Stay' feature that can prevent the phone's screen from turning off by looking at the phone, a personal assistant called S Voice, the ability to tag faces in the phone's gallery, an 'S Beam' feature to transfer files via NFC, an LED light on the front of the phone that can be used for notifications, a 'Motion Gestures' feature whereby users can accomplish tasks by moving the phone, color point effects for the camera, and 'smart alert' – an optional haptic feedback notification which vibrates the unit when picked up to notify the user.

More than 70 million units of the Galaxy S III were sold, making it the one of the most sold S series phone. The Samsung Galaxy S III was announced on May 3, 2012.

Android smart card reader sd sim card