Hi, I have pixel 4 xl with graphene, everything works fine, but I have unstable calls at my parent's house. My mom has pixel 6a with stock fw, she has "2G calls only" option in preferred network settings, or something like that, I don't remeber exactly. She can make calls with 2G fine, but on my 4 XL I see these: 4G only, 4G (recommended), and 3G, which no longer work here. So when I'm there, I have problems with calls, people don't hear me, I don't hear them, I need to go to the window, etc. My mom had the same problem too, but with 2G calls she can move freely around the house. I cannot find this setting. Do I need to enable it somewhere on graphene? Thank you.