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Saturday, December 10, 2011

Samsung Galaxy sII

The Samsung Galaxy S II (GT-I9100) is a smartphone running under the Android operating system that was announced by Samsung on February 13, 2011 at the Mobile World Congress. It is the successor to the Samsung Galaxy S, with a different appearance and significantly improved hardware. The Galaxy S II was one of the slimmest smartphones of the time, mostly 8.49 mm thin, except for two small bulges which take the total thickness of the phone to 9.91 mm.

The Galaxy S II has a 1.2 GHz dual-core "Exynos" system on a chip (SoC) processor, 1 GB of RAM, a 10.8 cm (4.3 in) WVGA Super AMOLED Plus screen display and an 8 megapixel camera with flash and full 1080p high definition video recording. It is one of the first devices to offer a Mobile High-definition Link (MHL), which allows up to 1080p uncompressed video output with HDMI while charging the device at the same time. USB On-The-Go (USB OTG) is supported.

The user-replaceable battery on the Galaxy S II gives up to ten hours of heavy usage, or two days of lighter usage. Samsung claims that talk time is 9 hours on 3G and 18.3 hours on 2G.

The Galaxy S II was given worldwide release dates starting from May 2011, by more than 140 vendors in some 120 countries.

On May 9, 2011, Samsung announced that they had received pre-orders for 3 million Galaxy S II units globally.

Most regions have received or are still scheduled to receive the Galaxy S II 'GT-I9100' model. Samsung have also announced the release of a Tegra 2 SoC powered 'GT-I9103' version in the name of the Samsung Galaxy R (or 'Galaxy Z' in Sweden). The variant release of the Galaxy R 'GT-I9103' seems to corroborate the previous news of an Nvidia Tegra 2 powered Galaxy S II smartphone. According to Eldar Murtazin, of, this is believed to be because Samsung is not able to meet worldwide shipment demands of both its own Exynos chip and Super AMOLED Plus screens. He noted that nobody expected the "huge success" and "sky high" demand for the previous Samsung Galaxy S.

The Galaxy S II has a 1.2 GHz dual core ARM Cortex-A9 processor that uses Samsung's own 'Exynos 4210' System on a chip (SoC) that was previously code-named "Orion".

The Exynos branded SoC was the source of much speculation concerning another branded successor to the previous "Hummingbird" single-core SoC of the Samsung Galaxy S. The Exynos 4210 uses ARM's Mali-400 MP GPU. This graphics GPU, supplied by ARM, is a move away from the PowerVR GPU of the Samsung Galaxy S.

The Exynos 4210 supports ARM's SIMD engine (also known as Media Processing Engine, or 'NEON' instructions), and may give a significant performance advantage in critical performance situations such as accelerated decoding for many multimedia codecs and formats (e.g., On2's VP6/7/8 or Real formats).

At the 2011 Game Developers Conference ARM's representatives demonstrated 60 Hz framerate playback in stereoscopic 3D running on the same Mali-400 MP and Exynos SoC. They said that an increased framerate of 70 Hz would be possible through the use of an HDMI 1.4 port.

The Motorola Atrix advertised in June 2011 that it was "the world's most powerful smartphone"; in August 2011 the UK Advertising Standards Authority ruled that the Atrix was not as powerful as Galaxy SII due to its faster processor.

However, the new Samsung Galaxy S II (i9100G) is not as powerful as the first variant launched which is i9100 due to the difference in the processor. The i9100G uses the TI OMAP 4430 processor clocked at 1 Ghz dual core which is less powerful than the Exynos. Graphics performance is not as powerful as the Mali-400 too. Although using a different processor and different firmware, Samsung did not notify customers nor name the phone as a different model.

The Galaxy S II has 1 GB of dedicated RAM (in either LPDDR or possibly DDR2/DDR3 by Samsung) and 16 GB of internal mass storage. Within the battery compartment there is an external microSD card slot.

The Samsung Galaxy S II uses a 108.5-millimetre (4.27 in)[10] WVGA Super AMOLED Plus capacitive touchscreen that is covered by Gorilla Glass with an oleophobic fingerprint-resistant coating. The display is an upgrade of its predecessor, and the "Plus" signifies that the display panel has done away with Pentile matrix to regular RGB matrix display which results in a 50% increase in sub-pixels. This translates to grain reduction and sharper images and text. In addition, Samsung have claimed that Super AMOLED Plus displays are 18% more power efficient than the older Super AMOLED displays. Some phones have display issues, with a few users reporting a "yellow tint" on the left bottom edge of the display when a neutral grey background is displayed. The resolution of the display is 800x480 pixels.

The Galaxy S II uses Yamaha audio hardware. The Galaxy S II's predecessor, the original Galaxy S, used Wolfson's WM8994 DAC. Some reviewers and online forum users of both phones have said that the Wolfson chip has better sound than the Yamaha.

The Galaxy S II is one of the earliest Android devices to natively support near field communication (NFC). This follows on from the Google Nexus S which was the first de-facto NFC smartphone device. It has been reported that the UK version will be supplied without an NFC chip at the beginning of its production run, with an NFC-equipped version released later in 2011.

Samsung has also included a new high-definition connection technology called Mobile High-definition Link (MHL). The main specialty of MHL is that it is optimized for mobile devices by allowing the device's battery to be charged while at the same time playing back multimedia content. For the Galaxy S II, the industry standard micro USB port found on the bottom of the device can be used with an MHL connector for a TV out connection to an external display, such as a high definition television.

The micro USB port on this device also supports USB On-The-Go (USB OTG) standard which means the Galaxy S II can act as a 'host' device in the same way as a desktop computer in allowing external USB devices to be plugged in and used. These external USB devices typically include USB flash drives and separately powered external hard drives. A video demonstration on YouTube[44] has shown the OTG function to be readily available with an ordinary micro USB (B-type) OTG adaptor. The same YouTube video goes on to mention a successful test completed on a 2 TB USB external hard drive (requiring own power source) but however reports of failure when trying to connecting USB keyboards, tested USB mice and tested USB game pads. Currently the only file-system supported for USB drives within OTG is Fat32.

A 3.5 mm TRRS headset jack is available and is located on the top-side of the device. The micro USB connection port is located on the bottom-side of the device.

BCM4330 combo chip integrates 802.11n Wi-Fi, Bluetooth 3.0 + HS and FM radio. BCM4330 supports Wi-Fi Direct that communicate directly with one another without having to interact with an access point.

The Galaxy S II ships with Android 2.3.3 (Gingerbread) installed.

Samsung Galaxy S II US variants will ship with Android 2.3.4 (Gingerbread) installed.

Latest available firmware from Samsung as of Oct 7 2011: Gingerbread 2.3.5 XXKI4

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