Sorry, I have been offline for some days. Yes I am based in Norway, and my carrier is ICE.
I would assume it was my SIM if it didnt happen with both me and my wifes phone on exactly the same update. This is a problem with graphene not my SIM. If it was just me I would order a new SIM.
I still have the problem and its so extremely frustrating. I wish I didnt have to use SMS and calls, but thats life, I need to be able to receive SMS and calls, and now Im not. The SIM just disconnects and doesnt give me lost calls or anything when I reset the network. It would be extremely weird if both me and my wifes phones or SIMs got the exact same physical defect at the exact same update and that it would be completely unrelated to software. That does not sound plausible at all unfortunatly.
I have been delighted to use graphene for over a year now, but this is really frustrating as it hurts my work. Still no solution, did not work with another update.