Samsung unveiled a new foldable phone, the Galaxy Z Flip. It's the tech giant's second attempt to sell consumers on phones with bendable screens and clamshell designs. The new phone can unfold from a small square upward into a traditional smartphone form, and will go on sale Feb. 14 starting at $1,380. The company announced the phone at a product event in San Francisco. Samsung's first foldable phone, the Galaxy Fold, finally went on sale last September after delays and reports of screens breaking. The Fold, which carries a price tag of nearly $2,000, folds at a vertical crease rather than horizontally as a flip-phone design would. The foldable phones represent manufacturers' attempt to energize a market where sales have slowed. Many consumers are holding onto old phones longer, in part because new phone features offer increasingly marginal benefits. But these foldable models come with higher price tags and are likely to appeal for now mostly to tech enthusiasts and others at the forefront of technology. The Z Flip can stay open at different angles for use watching videos or taking photos. When the phone is closed, it will take selfies and display notifications in a small window on the cover. Unfolded, its screen measures 6.7 inches diagonally. Samsung says it added fibers to the gap between the hinge and the phone to keep out dust and improve hinge function, likely to address shortcomings of the Galaxy Fold.