How to open App:
1. After installation, you see nothings change on your device screen, because this app is invisible. Just click on the bottom blank space near the bottom-right app icon to open this app. This way can work only one time.
2. After the first time, the only way to open it is through USSD code with your setting password following this syntax: *2718*your_password# => press call. your password could be anything but not an empty password.
Try this and don't do any devil things.