Samsung has officially launched the Samsung Galaxy Star 2, Galaxy Star Advance and Galaxy Ace NXT smartphones in India. The Galaxy Star 2 has a 3.5-inch HVGA display, powered by 1GHz single core processor and has 2-megapixel rear camera. The Galaxy Star Advance has a 4.3-inch WVGA screen, powered by a 1.2 GHz single-core processor and comes with a 3-megapixel rear camera with LED flash. The Galaxy Ace NXT went on sale earlier this month and packs a 4-inch WVGA screen and comes with a similar single-core processor and 3MP rear camera with LED flash as the Star Advance.