I am from Hungary and I am currently in France now. When I arrived here, my mobile phone carrier sent me an SMS that stated that the equivalent of my carrier I use in Hungary (Vodafone) is STR. I left the carrier selection on my phone on Automatic.
After a while, I noticed that the carrier my phone was using is not STR but Orange F. The problem is that I did not notice the change in time and actively used cellular data in the meantime.
Will this affect my monthly bill? Should I do anything about this?