The Galaxy S4 is armed with a 5-inch Full HD Super AMOLED display, 441 pixels per inch, powered by world’s first eight-core processor (that is 1.6GHz Exynos 5410 Octa), which consists four 1.6GHz Cortex-A15 cores plus an addition four another four Cortex-A7 cores clocked at 1.2GHz. These cores will be useful to offer maximum performance and maximize battery life of the device. There’s a 13MP AutoFocus camera on back side, microSD card slot to accept up to 64GB cards, 2,600mAh battery, which is removable.
The device will ship with some of the coolest features including with Smart Pause and Resume, Smart Scroll, Dual Camera feature (to let you capture photos and videos with the front and rear cameras simultaneously), S Health, S Travel, S Translator (supports 9 languages at launch), Group Play, S Voice Drive, Samsung Adaptive display, and it will boot Android 4.2 Jelly Bean OS with new version of TouchWiz UI on top of it.
The Nokia Lumia 920 is rocking a 4.5-inch PureMotion HD+ Clearblack display with 1280×768 pixels of resolution, 332PPI, Windows Phone 8 OS, 1.5GHz Qualcomm dual-core processor, 1GB RAM, 32GB onboard storage, a set of exclusive Nokia apps, and the revolutionary 8.1 megapixel PureView camera.
Apple iPhone 5 packs a 4-inch Retina display with 1136 by 640 pixels of resolution, 326 pixels per inch, 1.2GHz Apple A6 dual-core processor, 1GB RAM, 8MP camera on back side to record 1080p HD videos, Siri app (a personal voice assistant), and many more.
Samsung Galaxy S4 vs. Apple iPhone 5 vs. Nokia Lumia 920: Specs Comparison