You could lose your phone sometimes, and don't find it because you kept it Silent 

I'm here to fix your phone problem and rescue you with this simple, practical plan.

you need to install the application and touch the active button and put a key in it.

the program will be activated, and when you lose your phone, messaged the key to your phone number, and now you can call and find him.

The battery usage in this program is almost zero , but it's not a serious use of batteries.