@OrtizzleSD asked @VZWSupport on Twitter:
Q: My iPhone 4S will not stay turned off on its own and randomly does not produce sound. How can I fix this?
A: If there is no physical damage to the device itself, this may be caused by corrupted software. Here’s how you can restore* the device: http://support.apple.com/kb/HT1414http://support.apple.com/kb/HT1414
*Note: Restoring your device means all content and data will be erased (contacts, songs, videos, photos, calendar info, etc.) and restore settings to the original factory conditions.