This is the third time I've been in Italy and my iPhon 12 Max hasn't worked. (It works fine in Portugal.) O2 sent me a new SIM before this trip to try, but that hasn't solved anything. I've changed the APN to mobile.o2.co.uk, but it hasn't helped. O2, any advice for getting your service to work on my phone here? My partner's Vodaphone SIM works just fine in my phone... so it's definitely an O2 issue.
Try manually searching for a different network.
Can any of you help me? I can't even call O2. My phone literally only works on wifi here. Again, it's the third time this has happened, but my partner's Vodaphone SIM works fine in my phone in Italy and my phone also worked in Portugal last week. I haven't exceeded the number of days in Europe either. (As noted, I've also changed the APN.)