As of 2015, AT&T GoPhone customer service can be contacted at 1-800-901-9878 from 7:00 a.m. to 10:00 p.m. Monday through Friday, and Saturday through Sunday 9:00 a.m. to 7:00 p.m. AT&T offers 24 hour support on its website, ATT.com.
Customers can access GoPhone's 24 hour support by navigating to ATT.com, clicking Support and clicking GoPhone under the Product Support heading. Customers can refill their GoPhone account, set up auto fill and check their account balance. AT&T's GoPhone support page also features frequently asked questions, videos, troubleshooting tools and a community forum. The AT&T community forum allows registered customers to view, ask and answer questions about AT&T products and services.