Samsung Electronics Co. is banking on an artificial intelligence overhaul and tweaked hardware designs to sell its new line of Galaxy S25 smartphones.The company launched three new devices at an event Wednesday in San Jose, California: the S25 starting at $799, a larger S25+ and the top-tier S25 Ultra priced from $1,299 and up. Spanning 6.9 inches in size, the new Ultra model gains the most significant design changes and camera hardware upgrades....