The iPhone 15 and iPhone 15Plus graphic/Loren Elliott Apple, the iPhone 15 and iPhone 15Plus, released the iPhone 15 mobile phone series. The highlights of the new mobile phones include titanium shells, faster chip speeds and stronger video game capabilities.The biggest surprise of the iPhone 15, which will be listed on September 22: there is no price increase, which reflects the downturn in the global smartphone market.Apple held the press conference at California's Cabitino headquarters.At present, the company is facing many unfavorable factors including lingering economic uncertainty. In addition, competitors Huawei Technology Company has launched new flagship phones for the first time in several years to form a challenge to Apple.Apple's press conference did not bring any major surprises. After the press conference, the stock price closed 1.7%. ** Embedded machine learning ** Although Apple avoids artificial intelligence (AI) at the press conference, many new features are achieved through this technology.A senior executive of Apple said that when the company used machine learning to detect people in the viewing box, users can choose to generate portrait photos with blurred background, or adjust the effect of portrait photos in the photo app after taking the photo app.Apple also released a new watch, including Series 9 watches with the function of "double finger mutual dots". Users can lightly hit the thumb and fingers twice without contact with the watch.Task.Apple's chief operating officer Jeff Williams said that this function uses machine learning to detect slight changes in blood flow when the user's fingers are close, so as to free up another hand to perform other tasks, such as walking dogs or a cup of coffee. ** release the iPhone 15 new model ** iPhone 15 Pro and other iPhone 15 models with higher display and 48 million pixels, and the battery uses 100%recycled cobalt.Apple said that the iPhone 15's satellite connection function can now be used to call road rescue.Apple is launching this feature in cooperation with the American Automobile Association (AAA).Apple said that the charging boxes of iPhone 15 and AirPods Pro devices will be equipped with USB-C charging interfaces.This reflects the requirements of European regulators for using USB-C charging interfaces.The new USBC interface allows the iPhone 15 mobile phone to share the same charging cable with Mac or iPad.The iPhone 15 Pro uses titanium shells, which is lighter and stronger than the models using other metal shells before.Bob O'Donnell, the person in charge of Technalysis Research, said it was surprising that it was not surprising."I think both Apple and operators have realized that due to the pressure of consumer budgets and no major changes in functional changes, persuasion upgrades become more and more difficult. Keeping the price unchanged should help solve this problem," he saidEssenceThe iPhone 15 is priced at $ 799, the iPhone 15 Plus starts at $ 899, and the PRO series starts at $ 999.Pro Max's starting price is $ 1199, the same price as the same memory model last year.Last year, Apple launched a $ 1099 iPhone Pro Max model with a small memory.More than half of Apple's sales still depend on the iPhone, but the shipping volume of the global smartphone market in the second quarter has fallen from 294.5 million units in the same period last year to 268 million units.According to data from Counterpoint Research, Apple's shipments are the smallest among all major smartphone manufacturers, from 46.5 million units to 45.3 million units.