About this app

NGC 4388 provides following utility without ROOT permission.

1. Fixing the volume key with the media instead of ringer.

2. Provide detailed media volume as double steps of common case.
(Entirely 30 steps, more 10 steps when your volume guage under 1-bar)
*But this function is beta-version and it uses master-volume if your phone is not Galaxy nougat(7.0) version.
So you need to have caution when using this function.
(If master volume is 10%, then Alarm or Ring tone also 10% of common case.)

3. Silent function when shooting camera: It is used for self-portrait, baby picture, and animal picture.
(If your phone's default camera doesn't support silent shot, then this func. is useful to you.)
* This function is prohibited to use for illegal purpose.

4. Search for cell phone with specific code: This function is to turn off silent mode and maximize the ringer volume to make it easier to find when it is hard to find after losing a phone in the house.

5. Screen On Extension: This function is to prevent screen off during Internet or community reading.
When set, the screen turn-on time is set to maximum (the screen turn-off time is restored when the function is turned off or rebooted).

6. Set the screen to darker: Set the screen brightness to a darker setting to prevent glare when viewing the phone late at night.

7. Flashlight - Provides an notification icon that allows you to turn the flashlight on and off.

Required permission description
Allow accessibility - to determine if a specific app (camera) is running and need to activate the feature
SMS receiving right - Receiving SMS to function required
Run at boot - If there is a set function, it is necessary to turn on and off the phone
Prevention of power saving mode - When SMS is received and the phone is detected, it automatically notifies the activity for 30 seconds, so the screen does not turn off
Disable screen lock - To use SMS even when screen locked when searching phone
Change audio settings - Need to adjust audio volume
Allow to write system settings - required to change system settings to extend screen on time
Allow to draw on top of other apps - because you need to overlay the dark layout when making the screen darker
Allow to access Camera - Camera flash is used as a flashlight, so when using the flashlight function, camera access permission is required
device assistance app - It is necessary to register the app as a helper app to toggle each function by holding down the home button.
Vibration Control - When toggling the function through the volume up + down key when screen is off, it is necessary to give feedback to the user by vibrate that the button is pressed.
ACCESS_NOTIFICATION_POLICY - Need to execute Phone Finder by SMS even when the ringtone is silen
Plan for updates:
Improving Stability

-NGC 4388 does not require advertising and unnecessary permissions.
- Do not use for illegal or commercial purposes.

New features

Camera mute bug fix

App Permissions

Allows an application to receive SMS messages.
Allows an application to receive the ACTION_BOOT_COMPLETED that is broadcast after the system finishes booting.
Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.
Allows applications to disable the keyguard if it is not secure.
Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
Allows an application to modify global audio settings.
Allows an application to read or write the system settings.
Allows an app to create windows using the type TYPE_APPLICATION_OVERLAY, shown on top of all other apps.
Allows an application to read from external storage.
Required to be able to access the camera device.
Allows access to the vibrator.
Marker permission for applications that wish to access notification policy.