After inserting my SIM into the phone, I’ve noticed the letter R next to the signal strength indicator in the top-right corner of the screen (in the status bar). This usually indicates I’m “Roaming”, as in, I’m in a different country, using the local operators. But I’m currently in my home country, using my usual operator. The exact same SIM was not displayed as roaming on my old Android phone (also running Android 9).
My mobile phone operator is a Mobile Virtual Network Operator (MVNO), as in, they don’t operate their own cell towers, but rent the infrastructure from bigger operators. I’m assuming this might have something to do with it.
I should note that phone calls and mobile internet work as expected (after configuring the correct APN), and it doesn’t appear that the operator considers me to be roaming (there were no unexpected charges so far), so this is mostly a cosmetic issue.
Any thoughts? I’m happy to provide any other details that might be relevant.