After upgrading to ios 16.02 i was able to use my iphone xr for a few days then suddenly my cellular signal went off and no service. I reflash the ios 16.02 ipsw then my phone went unable to activate. I downgraged to ios 15.7 and my iphone xr works flawlessly without any issue. I think ios 16.02 still has many issues on older iphones. Hope they will fix these issues on ios future releases.