How to fix silent mode on iPhone 6S?

Okay so I now have an iPhone 6S, 128 GB- think it's cool? NOPE! Well it is, but IIm incredibly frustrated. If I put it on silent mode, it STILL makes sounds! I take a picture and it STILL makes a snapshot. Why? How can I fix this? Please huhu

Take it to an Apple Store if that's the case. On silent mode the only sounds that should come out of iPhones is music or videos from their respective apps.