AT&T today kicked off a promotion that allows its AT&T Prepaid customers to save some cash each month. Subscribers to the $65 or $85 unlimited plans can score a $20 discount on the cost of their monthly service, dropping the fees to $45 and $65 for a single line, respectively. The $45 plan includes unlimited high-speed data with SD video streaming, while the $65 plan adds unlimited talk and text in Mexico, 10 GB of mobile hotspot, and HD video streaming. New customers will be able to take advantage of more discounts. For example, new customers can get two lines of unlimited service for $80, with more lines earning deeper discounts. This requires the activation of two new lines, autopay, and enrolling in a multi-line account. Taxes and fees are not included. AT&T says this promotion will be available through January 10, 2019.