AT&T putting a line on hold?

Aug 1, 2007
It doesn't cost anything extra to suspend a line.
I understand that. But I know I have to pay like 10-20 dollars a month, just att lines are bogged and I can't find anything out current about it online. At least when I did it, my monthly payment wasn't there and I paid about 10-15 dollars back in 2012. Just don't know how much it is now.