Contact Boost to obtain your account number; it's not available in your online account. Call Boost at 1-888-266-7848 to retrieve your 9-digit account number. To speak with a live representative, wait for the opening message to switch to English. Upon prompt, enter your Boost phone number. Press option '4' when the system directs you to 'Technical Issues, press 4.' Then, listen to all menu options, and after the last one, wait for 10 seconds. You'll then be prompted to chat with a Boost Customer Care Representative by pressing '0' (zero). Provide your 4-digit Boost PIN number when asked. Subsequently, await transfer to a Boost Representative and request the account number for your personal records. Your passcode remains your 4-digit Boost PIN, the same one you use for logging in.An alternative method to reach Boost Mobile customer care, as suggested by a helpful user, is to repeatedly press zero about 10 to 15 times steadily after entering your number until you hear the automated voice saying, 'I am getting you a representative.'