You can purchase refills in various denominations (e.g., $15, $25, $45, $65, $100) from these major retailers: :
: Sells email-delivered refill codes in amounts ranging from $10 to $100. buy minutes for gophone
: Call 611 from your AT&T phone (or 1-800-901-9878 from any phone). Follow the automated prompts to "refill your account". You can purchase refills in various denominations (e
Once you have your refill PIN (from a physical card or email), use one of these methods to activate it: buy minutes for gophone
Make an AT&T Prepaid Payment - AT&T Wireless Customer Support