So my iPhone XS on iOS 12.1.1 has had the cellular internet connection stop working on 2 different occasions so far in the 1 month that I have owned it, it was brand new when I bought it. When the cellular internet has stopped working phone calls has still been possible, so it has only been the actual internet connection which has stopped working so far, meaning no apps that requires internet are working, and not possible to reach the internet through the phones web browsers. It just keeps trying to load the page, no error messages. When i turned on Airplane mode briefly and then turned off Airplane mode again the cellular internet has started working again. I have also sometimes the problem that when the phone is locked and I get a call I can't move the slider to answer, its stuck, so i end up missing the call. But i´m pretty sure that problem is unrelated? So I have tried restarting the phone but that did not help. I have not updated the iOS firmware and I don't want to do that at this moment, but I´m not too positive that would help if going by past experiences, I can't remember a single time when an iOS update has fixed any of my previous iPhone problems. So any ideas what might cause this and if there is any fixes for this?