Hangouts 6.1.109448852 apk requires following permissions on your android device.

• open network sockets.
• access to the vibrator.
• list of accounts in the Accounts Service.
• access information about networks.
• write to external storage.
• read the user's contacts data.
• read only access to phone state.
• perform I/O operations over NFC.
• install a shortcut in Launcher.
• prevent processor from sleeping or screen from dimming.
• access approximate location.
• access precise location.
• access the camera device.
• modify global audio settings.
• record audio.
• connect to paired bluetooth devices.
• access information about Wi-Fi networks.
• change network connectivity state.
• broadcast sticky intents.
• read from external storage.
• read SMS messages.
• receive SMS messages.
• send SMS messages.
• monitor incoming MMS messages.
• initiate a phone call without going through the Dialer user interface for the user to confirm the call.
• write the user's contacts data.