What does my friend need to do when he/she has received my referral code? Yoodo Care June 30, 2020 03:21 Updated Your friend will need to order and activate their SIM using your referral code. Related articles My friend forgot to use my referral code. Is there a way to attribute it back to my account? Can my friend still apply my referral code after his/her SIM is activated? What is the difference between the Leaderboard Challenge and First Referral Challenge? Comments 0 comments Please sign in to leave a comment.