You may be confusing 5Ghz Wi-Fi with 5G Cellular service. The iPhone XR supports 5Ghz Wi-Fi but does not support 5G Cellular service. The 5G Cellular service is available on iPhones 12 and newer models. I believe that your iPhone XR connects to 5Ghz (Gigahertz) Wi-Fi. It will never ...
After months of complaining about the performance of my cable company's superfast internet, I have finally realized the problem might be my mid-2014 MacBook Pro. Concurrent speed tests on my 2014 MBP, my husband's 2018 MBP, and my iPhone XR got download speeds around 450mbps on the latter...