Please help my out!!! I've lost my iPhone 4 in my house (I'm sure of it) and it is on silent so when we call it, we can't hear it vibrate. It has plenty of charge, 80% I think. There are no "lost" phone apps installed on it right now. Is there a way to either remotely install an app or send a txt message to turn the ringer on? Please help! I'm desperate!!! Thanks.