Samsung has introduced the Galaxy Note 8 tablet with an 8-inch display, adding a new screen size to its expanding lineup of Note products. The tablet is 25 percent lighter thinner than the company's Galaxy Tab 2 tablets, said Shoneel Kolhatkar, director of product planning at Samsung. It can display images at 1,280-by-800 pixel resolution, and comes with optional 3G connectivity for making calls and using mobile broadband networks. It will connect to HSPA+ networks.