Walmart is one of the select retailers that AT&T Prepaid services are sold through. For a limited time, Walmart is offering 25GB of AT&T Prepaid data for $50 ($40 with AutoPay) - when you buy a phone through Walmart AND activate a new line of service.
This $50 plan is known as the '8GB' plan, but with this offer, 17GB of bonus data will be added to the plan within 10 days. You will receive the 17GB of bonus data each month that you successfully renew your $50 8GB plan.
All data on this plan is eligible for use via mobile hotspot.
Any remaining data from the plan (8GB) will rollover to the next month. Bonus data does not rollover.
There is an additional $10 discount on this plan when you sign up for AutoPay - bringing plan pricing to $40 when on AutoPay.
More info: Walmart AT&T Prepaid Exclusive