My switch was being toggled by the Apple silicone case. If you have an Apple case, you can easily duplicate this by gently pushing the top left corner of the case (the one nearest the silent mode switch) toward the back of the phone. Without much effort, it will trip the switch. So, in my case, when my phone was in my pocket, it would often flip the silent mode switch. Since I returned the Apple case and replaced it with an Otterbox Symmetry MagSafe case, it no longer accidentally flips the switch. However, the my MagSafe wallet does not stay on as well as it did on the Apple case. I do not know if it's due to the strength of the magnets or the fact that the silicone case was "grippier" or something else. I saw where another poster replaced his Apple case with a Nomad case and the problem went away. Good Luck!