Findy

By Findy app, you will get your mobile phone even if it's in silent mode.
You can use two features for doing so, the first one, you can add up to 3 numbers only, then calling your phone with any number from the added numbers, you will hear its ringtone even if it's in silent mode.
The second one, if your phone gets that it's in a dark area, it will make a notification with a noisy sound until you swipe the notification to stop this noisy sound.