Apple's iPhone loyalty takes a small hit when customers switch carriers, but it remains stronger than Android even under pressure.Apple's customer loyalty remains top notchConsumer Intelligence Research Partners (CIRP) published new data in August 2025 showing how much Apple's U.S. sales lean on carriers. About three-quarters of iPhone sales go through AT&T, Verizon, and T-Mobile.Those deals are often bundled with financing or promotions. Store …