You can purchase refill cards from retailers like Walmart or Best Buy to add a balance to your account, which can then be used to buy the add-on. Popular Data Plan Options (2026)
Buying data for an (formerly GoPhone) account is primarily done through "Add-Ons," which allow you to supplement your existing plan's data limit. As of April 2026, the standard rate for additional data is $10 for 5GB . How to Buy Data Add-Ons You can purchase extra data using these three methods: at&t gophone buy data
Sign in to your AT&T Prepaid account , select Manage Prepaid account , then navigate to Add-Ons to choose and purchase your data. You can purchase refill cards from retailers like