Ok, I'll explain it step by step. 1. On the title screen click the orange smiley face at the top middle part of the bottom screen. 2. From there go to the right and the details should be under your Mii's name. This way you can add anyone who has a 3ds so once you find out can you tell me your friend code so I can add you. Btw what games do you have because I could do multiplayer with you on some of the games eg Mario Kart 7.