Apple’s iPhone is definitely one of the most popular smartphones in the world and the Apple’s latest iPhone 5S has proven this again. It is even more improved version of previous model, as it is more than twice as fast and in addition, it also has an improved camera and a brand new feature none of its competitors can compete. The key features of new iPhone 5s are 4-inch Retina display, Fingerprint unlocking, 8MP Camera, True-Tone LED flash, A7 Dual-core processor and Aluminium body. Specifications: • Lenght: 123.8 mm • Width: 58.6 mm • Thickness: 7.6 mm • Weight: 112 g • Screen Size: 640 x 1136 pixels, 4.0 inches (~326 ppi pixel density) • Operating System: Apple iOS 7 • Camera resolution: 8 MP, 3264x2448 pixels, autofocus, dual-LED (True Tone) flash. Features: 1/3\'\' sensor size, 1.5 µm pixel size, simultaneous HD video and image recording, touch focus, geo-tagging, face detection, HDR panorama, HDR photo • Video Resolution: Yes, 1080p@30fps, 720p@120fps, advanced video stabilization • Processor: Apple A7 • Connectivity: Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi hotspot, Bluetooth 4.0 • High-speed Data: DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps, LTE, 100 Mbps; EV-DO Rev. A, up to 3.1 Mbps • Built-in Memory: 16GB, 32GB, 64GB, no SD-support iPhone 5S is elegant and slim smartphone. It has aluminium body and at first glance it looks very similar, almost identical to its predecessor, as they both have the same design, but there are some changes in color options (black is now a lighter space grey and there is also a new gold option). It is also lighter, weighting only 112 grams. The materials, the volume, mute, and power buttons and the speaker grille layout are the same as at the previous iPhone. The first (and almost only) difference that you can notice with design is a home button which is still in the same position, but it is now edged in stainless steel with a sapphire crystal, that provides a useful function, the Touch ID. 3.5 mm headphone jack is now at the bottom of the smartphone. The iPhone 5S (the same as iPhone 5) features a 4in Retina display with 1136x640 resolution at 326ppi, which assures bright and vibrant colors on webpages, games or videos. The high-quality in-plane switching (IPS) panel is also evenly lit and it assures viewing angles down from the top, up from the bottom, front or side on. The camera on iPhone 5S has been improved. It has increased pixel size, which now allows to let more light and color into images. It also has a dual-LED flash, designed to apply exactly the right color combination to your photo\'s subject. The greatest pros that I would to highlight are: excellent performance, great all-round camera and it is very light and comfortable for handling with it in one hand. But on the other side, it has a bit too small screen, at least for me.