Plan Sale notification?

Hi guys!

The plan i have now is great for me:

An iphone with 300mb data

Unlimited talk and text

all for $70

my question is: what is the best way to set up a way to get notifed if att has a sale or the price goes down on my plan? like if the 300mb data, Unlimited talk and text goes on sale or goes down to $50....  will i get notifed be an email?  do you have a plan change notification option in settings?

or is it easier to chat with a rep every 6 months to see if there is a sale or price drop?

Thanks.