samsung galexy s4

here we go the new samsung galexy s4 was launch.This is the first smartphone to use an AMOLED display with a Full HD resolution. Measuring 4.99in across this gives it an on-paper pixels-per-inch figure of 441, up from 306PPI on the Galaxy S3. As always, it's worth noting that the display uses a pentile arrangement of subpixels - with two colours per pixel, rather than three – which means its actual resolution is less than equivalent LCD displays.

This is less of a problem on a Full HD display than it was previously. The incredibly high number of pixels-per-inch makes the lack of refinement, usually apparent on the edges of text, practically unnoticeable. Furthermore, the incredible contrast you get from an AMOLED display more than makes up for any small perceivable loss of detail.

In practical use there's far less difference between this and the LCD HTC One than their technology would suggest. The pentile pixel arrangement doesn't seem to noticeably effect detail on the S4, while the contrast on the HTC One was also excellent. The colours on the S4 are a little richer at any given brightness, but then the HTC One is far brighter at its maximum setting, handy on sunny days - although run it that way all the time and your battery life will be severely diminished.

Speaking of brightness, Samsung's controls are far better, with a brightness slider always present on the notifications drop down menu. This also lets you tweak the auto brightness settings, allowing you to have it a few steps brighter, or dimmer, than the variable default. By comparison the HTC One makes you dig in the menus to adjust it and offers no such tweaking of the auto setting

Having said all that, the biggest difference is simply that the S4's screen is bigger. It's not a huge deal when using apps day to day, sending texts, or hammering out a quick email, but for browsing desktop website sites, playing games and watching video clips it's a big plus.the worlds best android smartphone.iven its big 4.99in display, the S4 is surprisingly svelte. It measures just 136.6x69.8x7.9mm and weighs only 130g. That makes it both smaller overall and lighter than both its immediate rivals, the Sony Xperia Z and our current favourite, the HTC One.

From the front the most obvious change is the thinner screen bezels, both down the edges and at other end. This puts the screen just 2.5mm away from the edge of the device and it's becoming hard to imagine this distance getting any smaller without seriously compromising the survivability of the handset when dropped. The sides have been squared off, compared to the S3, which makes it easier to grip though it looks a little chunkier for it.