calalac replied to your photo “I basically love Fi so far, but this is something I don’t understand...”
It means you've used 12MB so far, and when you reach 1GB your phone will automatically warn you :) though I'd suggest setting the warning a little lower so it tells you before you reach 1GB...
Thanks @calalac! The weird thing is that right before taking this screenshot, I had just gotten a notification saying “Warning: you have reached your 1GB data limit.” Which is why I was so confused when I went and checked my data and it said “12MB”. Do you know anything about that...? (It’s probably based in my own technological ineptitude, lol, but that’s why I’m appealing to the Tumblr hivemind as a last resort...)