Yes, AT&T Prepaid offers various plans that allow for data usage, and you can indeed use an AT&T Go Phone card specifically for data only. However, it is important to note that most AT&T prepaid plans are structured to include voice, text, and data as part of their offerings. If your primary need is data, you will want to explore specific plans that focus on data usage while minimizing or excluding voice and text features. Additionally, AT&T has options like data add-ons that can enhance a user's data allowance without the need for traditional voice services. For the most updated data-only plans and their specific details, it is advisable to visit the official AT&T website, as they frequently update their offerings and coverage.