The newly imposed U.S. import tariffs have resulted in a surge of customers rushing to Apple stores to buy iPhones, fearing steep price hikes.Apple's retail stores reported higher sales over the weekend than in previous years in major markets.Some customers are upgrading their iPhones during the off-peak season in anticipation of price increases due to tariffs.Despite speculations, iPhones are not expected to cost thousands of dollars apiece due to tariffs.