Get Some Peace, Stay Connected Using Do Not Disturb Mode on Your iPhone
I must have inadvertently turned on 'Do Not Disturb' mode on my iPhone 4S a couple months ago, because my phone seemed to randomly stop ringing for most phone calls and text messages.
That was OK for the most part, because I had more or less stopped answering my phone anyway and no text message was ever so important that it couldn't wait a few minutes for me to visually check my screen. Still, it didn't make sense that some calls and messages got through while others did not. And as one who has 50 + custom ring and text tones, I was missing out on my personal symphony
'Do Not Disturb' mode is available to you through either the Control Center, or with more options through the main Settings page in IOS 7. You can customize which calls and texts will ring through from either your phone favourites, or any group in your address book.
Keep in mind the calls and texts are still going to voicemail, and available visually on the screen, your phone just won't alert you through the speaker. You can schedule when it kicks in, say from 5:00 pm till 9:00 am and buy yourself some peace and quiet, while keeping closely, if not constantly connected.