Cancel, update payment info, or change the payment method or amount for your AT&T PREPAID account enrolled in AutoPay.
Eligibility for AutoPay savings program for AT&T PREPAIDSM
The AutoPay $5 discount eligibility is based on:
Active AutoPay enrollment.
Enrollment in a $30 monthly plan or higher.
Your AutoPay enrollment date. If you started before April 22, 2017, the AutoPay amount can't be less than $5 below your monthly plan. For example, if your monthly plan is $45, the AutoPay amount can't be less than $40 to continue receiving the discount.