Purchase Blocker is a free feature that allows you to block your device from making mobile purchases and buying subscriptions sold by other companies that would be deducted from your AT&T account. Purchase Blocker also blocks some mobile purchases and subscriptions sold by AT&T.
When Purchase Blocker is on, existing mobile subscriptions will be canceled and one-time purchase attempts will be unsuccessful (including one-time charitable donations). Purchase Blocker does not restrict mobile purchases paid with credit cards or other forms of payment. Adding Purchase Blocker
Purchase Blocker must be added to each wireless number you wish to block in your account. Add it to your wireless number by logging in to myAT&T
and selecting Add-Ons