: Visit the AT&T activation page or follow the prompts on the included flier.
If your phone supports it, you can skip the physical card entirely. You can activate an almost instantly through the AT&T BYOD portal , which avoids shipping times and plastic waste. If you'd like more specific help, let me know: Do you already have an AT&T account ? buy at&t sim card
: Use the tri-cut card to fit your specific device's tray. : Visit the AT&T activation page or follow