The Financial Post reports in its Tuesday edition that margins at the Big Three wireless carriers could take a hit in the next quarter, according to one Bay Street analyst. The Post's Emily Jackson writes that higher demand for new hardware is expected to put incremental pressure on the costs of acquiring and retaining customers across the industry, Barclays Capital analyst Phillip Huang wrote in a note Monday. Sticker shock for the new iPhones -- $400 to $800 on two-year plans -- does not appear to be scaring away buyers. Preordered stocks of iPhone 7 and iPhone 7 Plus were largely sold out across the country, resulting in steep discounts for older iPhones. "We believe very limited pre-order supply was allocated to the Canadian carriers this year, partly due to the strong demand in the U.S.," Mr. Huang wrote. "Despite limited supply of the new iPhones, the carriers are capitalizing on the increased traffic to their stores with deeply discounted older iPhone models to ensure customers do not walk out empty-handed." The companies will have to spend more on hardware and absorb the discounts. Mr. Huang believes older iPhone models will drive most sales next quarter amid the rationing of supply in Canada.