Adding airtime (Reboost) to your Boost Prepaid Wireless Phone is easy, first you need to purchase a refill pin number – you can order online at Within a few minutes you will receive your airtime pin number by email – once received, simply dial 611 from your Boost phone and press send then follow the voice prompts – OR – you can call 1-888-BOOST-4U (1-888-266-7848) from any phone and follow the simple voice prompts.