I do think that companies do play with privacy issue.

Hi all I found your forum by going to Google and typing cellphone plus forum and here I am.
I was wondering if anyone knows of a cell phone company that will alert you when you are
in danger of exceeding your alloted minutes on your account or in danger of exceeding your
limits for a data plan. I have been with T-mobile and they are thieves in my opinion.
They send me a text message when I send them a payment thanking me, but not a word
when my teenage daughter is on the verge of exceeding our alloted minutes.