››Lock your device

Adjust the brightness manually

1 In the application list, select Settings → Display → Brightness.

2 Clear the tick box next to Automatic brightness.

3 Drag the slider to the left or right.

4 Select OK.

You can lock your device by activating the screen lock feature.

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If you forget your password, take your device to a Samsung Service Centre to reset it.

Samsung is not responsible for the loss of passwords or private information, or other damages caused by illegal software.

Set a face detection unlock

1 In the application list, select Settings → Lock screen → Screen lock → Face unlock.

2 Select Next → Set it up → Continue.

3 Adjust the device to fit your face inside the figure.

4 When your face is captured correctly, select Continue.

5 Complete the setup of the secondary unlock PIN or pattern.

Set a face and voice recognition unlock

1 In the application list, select Settings → Lock screen → Screen lock → Face and voice.

2 Select Next → Set it up → Continue.

Getting started

GT-I9300RWDXXV, GT-I9300MBDXXV, GT-I9300ZKAXSG, GT-I9300GREAFR, GT-I9300RWDTHR specifications

The Samsung GT-I9300 series, also known as the Galaxy S3, was released in 2012 and quickly became a hallmark of innovation in the smartphone market. Among the models identified—GT-I9300RWXJED, GT-I9300ZIDTHR, GT-I9300RWXXSG, GT-I9300MBXXSG, and GT-I9300MBDAFR—each variant shares core features while catering to different regional markets.

One of the standout characteristics of the Galaxy S3 is its impressive display. The device sports a 4.8-inch Super AMOLED screen with a resolution of 720 x 1280 pixels, delivering vibrant colors and deep contrast ratios. This display technology enhances the viewing experience whether one is watching videos or scrolling through photos. The sleek design, featuring a plastic body with a curved back, made it both lightweight and easy to hold.

Under the hood, the Galaxy S3 is powered by powerful processors—either the Exynos 4412 or Qualcomm Snapdragon S4, depending on the model. These chipsets, coupled with 1GB of RAM, provide users with the performance needed for multitasking, smoother graphics, and more efficient energy consumption. The device comes with internal storage options ranging from 16GB to 64GB, expandable via microSD, offering ample space for apps, media, and documents.

Another key feature of the Galaxy S3 is its camera. It boasts an 8-megapixel rear camera and a 1.9-megapixel front camera, capable of capturing high-quality images and 1080p video. The camera is equipped with features like autofocus, LED flash, and burst shooting, making it appealing for photography enthusiasts.

From a technological perspective, the Galaxy S3 also showcases advanced features for its time. It introduced Smart Stay, which uses the front camera to keep the screen on while the user is looking at it, and S Voice, Samsung's voice recognition software. Furthermore, it runs on Android 4.0 Ice Cream Sandwich, which can be updated to later versions, providing users access to the latest apps and functionalities.

The device supports 2G, 3G, and 4G LTE modes, depending on the variant, ensuring compatibility with various networks. With its robust design and feature-rich specifications, the Samsung GT-I9300 series set a high benchmark for future smartphones, making it a memorable entry in the competitive world of mobile technology.