We won't upload your personal data without your permissions.
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About required permissions:
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Location: Android 6.0 needs it to use BLE
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Bluetooth connection information: that is the way to control LEDs
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SMS, Device ID and call information: just to get the event of incoming calls or messages, to make LEDs blink. 
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Photes/Media/Files, Storage: to search and play local music files only in Music Mode 
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Microphone: to recore your voice only in Microphone Mode