Activate a Sprint prepaid phone by calling Sprint at (866) 866-7509 or by visiting its prepaid website, Prepaid.Sprint.com. The website also allows you to check the status of your activation.
To activate your Sprint prepaid phone online, navigate to Prepaid.Sprint.com, and click Activate. Choose the option that best describes your situation, and click Next. Enter the ZIP code, choose a prepaid plan, and enter your payment information and your phone number.
All three Sprint prepaid plans include unlimited talk and text, as of 2015. The $35-per-month plan includes 1 gigabyte of data, the $45 plan includes 3 gigabytes of data, and the $55 plan includes 6 gigabytes of data.