According to user reports, the iPhone 15 might have a Bluetooth issue

You’ll see in our iPhone 15 review that we were very impressed with Apple’s flagship, but its launch hasn’t been without its problems – and it seems a significant number of people are experiencing Bluetooth issues with the device.

As reported by MacRumorsBased on comments on the site’s forums, these Bluetooth issues have been going on since the iPhone 15 first went on sale in September 2023. The majority of complaints appear to be related to connecting to older Bluetooth devices, including car stereos and headphones.