You need a boost mobile too do this!
Call 611 and press 3 then wait for it to say"enter your phone number", enter the persons number you are trying to get in touch with, it say you have XXX days remaining on your account.Boost mobile gives you 90 days so take 90 from whatever they have( example: 90-80 days left, so they bought and card 10 days ago). Take the days and look on a calender, say its 10 days ago and today is May 11th, so they bought a Boost card on the 1st of may.Most likely a $20 card so you can guess that theres only $20,$30,$50 cards.Write down all this information so you don't forget.
Next, you need 3 phone by you and you must know all the numbers including area codes, they don'y need to be cell phones, using all the phones call the person your trying to get access codes from, make sure you are using *67. Call 611 again and hit 4, then 6, when you call say you forgot your boost passcode, they will ask you when you last rebooted and how much,( the amount you will have to guess but you can usually guess from how much there balance was and how many days they re-booted.
They will ask for the last 3 numbers that have called you or that you have received, thats where the 3 numbers you just called works in, after you tell them they will give you the access codes.I tried this out and it works, enjoy!
REMEMBER WHEN YOU DO THE 3 CALLS YOU MUST BE CALLING BOOST ASAP BECAUSE IF SOMEONE ELSE CALLS IN YOU HAVE TO DO IT ALL OVER AGIAN.