CUPERTINO, California, Sept 9 (Reuters) - Apple (AAPL.O), opens new tab on Tuesday introduced an upgraded line of new iPhones, including a slimmer iPhone Air, and held prices steady amid U.S.

Apple CEO Tim Cook told CNBC that the latest price hikes on some iPhone models aren't related to tariffs. The comments came as Apple's newest iPhones hit store shelves worldwide. Apple has largely ...