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I am using Android 5.1.1 on a Nexus 4.

When the screen is locked, I still can change the sound settings (mute, volume) and I can pull down the top screen menu with the settings for WLAN / Bluetooth, flashlight and so on.

Sometimes I do switch those settings accidentally when the phone is in my pocket, so the light goes on and the battery is finished fast.

How can I lock those settings?

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