There are two ways to unfollow someone on Mango Live. The first way is to go to the person's profile and tap the "Following" button. This will stop you from receiving notifications when that person goes live or posts new content. The second way is to go to your Following list (found in the Me tab) and tap the X next to the person you want to unfollow. Again, this will stop you from receiving notifications when that person goes live or posts new content.