Viber Messenger 7.8.0.0 apk requires following permissions on your android device.

• open network sockets.
• access information about Wi-Fi networks.
• access information about networks.
• read the user's contacts data.
• write the user's contacts data.
• read only access to phone state.
• read the user's call log.
• initiate a phone call without going through the Dialer user interface for the user to confirm the call.
• receive SMS messages.
• read SMS messages.
• access to the vibrator.
• write to external storage.
• modify global audio settings.
• prevent processor from sleeping or screen from dimming.
• connect to paired bluetooth devices.
• discover and pair bluetooth devices.
• record audio.
• disable the keyguard if it is not secure.
• change network connectivity state.
• read or write the system settings.
• set the wallpaper.
• list of accounts in the Accounts Service.
• read the sync settings.
• write the sync settings.
• read the sync stats.
• access the camera device.
• access approximate location.
• broadcast sticky intents.
• access precise location.