One big issue for people who have iPhones is the lack of coverage in certain areas. Like, oh a bedroom, basement, or the whole state of Vermont at one time. Supposedly, there’s a fix coming soon, where you own an AT&T box, plug it into your highspeed wired internet service, and then it becomes a mini cell tower for your area. Not too big, enough for a home or office space, but it would certainly improve the usability of a iPhone (with not so great reception from what I hear) for many people.
Now, if only it’d work at Catalina.