South Korean tech giant Samsung unveiled the successor of the Samsung Galaxy S3 - Galaxy S4 and wowed many critics and reviewers. The smartphone will battle head on with other smartphones in the market.

Samsung Galaxy S4 is equipped with Super AMOLED HD screen display with 1080x1920 pixel resolution at 441 pixels per inch trumps the iPhone 5's 1136x640 Retina display. The S4 has 2GB of RAM and will be available in 16, 32 and 64 GB models, with a Micro SD slot capable of housing up to 64GB extra storage space.

The new smartphone from Samsung will be available in Telstra, Vodafone and Virgin Mobile and will work on the 3G and high-speed 4G LTE mobile networks in Australia.

The S4 will run on the latest version of Google's Android operating system (4.2.2 Jelly Bean) and be powered by Samsung's new Exynos 5 Octa processor. However, the device will run on Qualcomm's quad-core chip in the US. The phone features an upgraded 2600 mAh battery, compared to the 2100 mAh batter of the Galaxy S3.

The Samsung Galaxy S4 will compete against other smartphones in the market such as the successor of LG Nexus 4 coined as Nexus 5, which is rumoured to sport a 5-inch full-HD (1920 x 1080) display translating into a pixel density of 440ppi. The device is also speculated to be equipped with NVIDIA Tegra 4 processor with 2GB of RAM, 8/16GB of internal storage, a 13-megapixel auto-focus rear camera with LED flash and a 3-megapixel front-facing camera.

The smartphone will bear the same affordable price as its predecessor, which is one of the selling points of LG Nexus 4.

The rumoured Nexus 5 will be running the latest Android iteration out of the box, and since the Android 5.0 Key Lime Pie is expected to launch in May at Google I/O, this will be the version underpinning the new flagship smartphone.

However, there is no official confirmation from LG or Google.