New 6.3-inch Samsung phone approaches tablet size Smartphones are getting bigger as people use them more to watch movies and play games. A new one from Samsung is beyond big. With a screen measuring 6.3 inches diagonally, the Galaxy Mega is almost as big as a 7-inch tablet computer. The difference: it makes phone calls. Samsung says the Mega is a hybrid that combines the portability of a smartphone with the immersive experience that a tablet offers for movies, books, music and games. Samsung Electronics Co. is known for big phones. Its flagship Galaxy S4 is 5 inches, while the Galaxy Note 2 is 5.5 inches. Apple's iPhone 5 is 4 inches. AT&T Inc. says it will start selling it Friday for $150 with a two-year service contract. It's also coming to Sprint and U.S. Cellular.