We have 4 IPhone in our household, 3 XR and an XS. After 14.2 update, my XR was the only one with this problem. After losing service/network, sometimes it would recover on its own, but most times I would have to shut down phone and restart it to regain service/network. Patiently waited for 14.3 and installed it yesterday (121420) and so far, fingers crossed, it has worked. Haven’t lost service or network yet, will update at later date.