1. AT&T SIGNATURE PROGRAM $10 PER MONTH DISCOUNT OFFER: Requires AT&T Unlimited Premium PL plan. Plan available in select locations only. Discount applied after any available AutoPay and paperless bill discount. Accounts with 6 to 10 lines receive $5 per month discount per line. May not be stackable or combinable w/other offers, credits, discounts or promotions. Exclusions: Military, Veterans, First Responders, Massachusetts Public Sector Employees, AT&T employees, EMO, IMO and FirstNet customers. May not be combinable with other select offers or promotions. See for additional details.