Lately I have noticed my ringer volume has been changing on its own. I have my screen set to lock, and I know I am not accidentily hitting the buttons to control volume. I usually have my phone on vibrate but lately while its sitting on my desk with nothing touching it, it seems to change to 'silent' on its own. Its almost always been from 'vibrate' to 'silent' but once it changed from 'silent' to 'volume 1'. I really dont think its 'user error' and as I said, this never used to happen. Its only started the last 2 weeks. Has anyone else been having a similar issue? Do you think something else could be affecting this?