I have same problem drops overnight and on 16.1.2. Spent 1.5 hour on phone w AT&T support, supposedly they updated my sim. Problem came back 2 days laterMy iPhone 14 Pro looses all network connectivity (WiFi & Carrier) randomly throughout the day and you need to do a full reboot to get a network connection again. This issue existed in 16.0 and was resolved in 16.0.1 but it reappeared in 16.0.2, if I downgrade to 16.0.1 everything is fine.
Does anyone have a similar issue?