My girlfriend received a text message that she was at 75% of her data.
I've read on here that besides this message, there will also be one at 95%
She was then concerned that she'd go over her data for the month and said she'd stop using high consuming apps. I on the other hand, wanted to say no, go ahead, we will have to monitor your data.
Other than signing in and reading what the data was at (not sure if that's in real-time?), I couldn't find any place to set a data reminder, set by the user themselves. So for example, going into our profiles, where it would ask "Would you like a data reminder?" where you can say yes and select which reminder you want, where in this case, you would select 75% to get that one).
So, for us, I would probably set a 75/80/85/90/95/99
The more the better!