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16 Reasons for the LG Optimus 4X HD

LG Optimus 4X HD
camera
Has a serial shot mode Yes vs No You can shoot multiple pictures in a row.
Has manual iso Yes vs No This allows to manually set the ISO level.
Has a back side-illuminated sensor Yes vs No BSI (Backside Illuminated Sensor) is a new type of image sensor which features a better quality in poor lighting conditions and better overall sharpness and image quality.
Has a built-in HDR mode Yes vs No It can automatically shoot pictures with an higher dynamic range (HDR).
Has manual white balance Yes vs No This allows to manually set the white balance.
Has a CMOS sensor Yes vs No The CMOS sensor captures the image. Most devices have CCD sensors but some have CMOS sensors which is produced by a CMOS process and has emerged as an alternative to charge-coupled device (CCD) image sensors leading to better image quality.
physical
Clearly lower SAR for body (USA) 0.74 W/kg vs 0.96 W/kg 0.22 W/kg lower SAR for body (USA). SAR (Specific Absorption Rate) describes how much radio frequency energy emitted by the device will be absorbed by your body. The rate is measured at hip level. The legal limit is 1.6 W/kg in the USA.
cpu
Clearly smaller semiconductor size 40 nm vs 45 nm 11.11% smaller semiconductor size. A smaller size indicates that the process to create the chip is newer.
Faster CPU clock speed 4x 1.5 GHz vs 2x 1.2 GHz 2.5x faster CPU clock speed.
display
Every pixel has three subpixels Yes vs No The device has three full subpixels per pixel which results in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. It may result in less crisp or little blurred image.
Slightly bigger screen size 4.7" vs 4.3" 9.3% bigger screen size. The bigger the screen size is, the better the user experience.
Measurably higher pixel density 312 ppi vs 218 ppi 43.12% higher pixel density.
Higher resolution 720 x 1280 px vs 480 x 800 px 2.4x higher resolution.
connectivity
Considerably newer Bluetooth Version 4 vs 3 Newer Bluetooth Version.
Has an HDMI output Yes vs No Video and movies can be watched on a TV with HDMI input.
power
Reasonably more battery power 2,150 mAh vs 1,650 mAh 30.3% more battery power.

Seven Reasons for the Samsung Galaxy S2

Samsung Galaxy S II I9100 16GB
Also known as: Samsung Galaxy S II I9100 16GB, Samsung Galaxy S 2
camera
Vastly more megapixel (photo, front camera) 2 MP vs 1.3 MP 1.54x more megapixel (photo, front camera).
physical
Lower SAR for head (USA) 0.16 W/kg vs 0.51 W/kg 0.35 W/kg lower SAR for head (USA). SAR (Specific Absorption Rate) describes how much radio frequency energy emitted by the device will be absorbed by your body. The rate is measured at head level. The legal limit is 1.6 W/kg in the USA.
Lighter 116 g vs 133 g 17 g lighter.
Narrower 66.1 mm vs 68.1 mm 2 mm narrower.
Thinner 8.5 mm vs 8.9 mm 0.4 mm thinner.
Less body volume 70.3 cm³ vs 80.2 cm³ 12.34% less body volume.
Shorter 125.3 mm vs 132.4 mm 7.1 mm shorter.

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