I have an iphone 13 that a couple of times a day loses all bars of service. It can be anywhere. If I shut off my phone and then restart it the bars come back. However while the bars are gone I cannot make or receive calls. This results in missing calls since I don't notice that I have lost bars. I have tried every reset possible all the way to a factory reset. I even had Verizon send me a replacement phone still having the issue. I have replaced the sim card with a new one, still lose my bars multiple times a day. Soon as I restart the phone they come back. Anyone else with this issue and or a solution?