Facebook roll out voice call feature for Facebook Messenger for both Android and iPhone mobile app in India. Now you can see Free Call option in the chat window button on android. And I button on iPhone.By using this option now Facebook user can make free call to their Facebook friends. Only internet data charge will apply and no other extra money required for this.This voice call service work on 3G and Wi-Fi networks and available on both Android and iOS platform.Few days before WhatsApp also announced to add voice call service to its product in second quarter of 2014. Facebook already started free voice call service in US and Canada in 2013. Here is how to do voice calling via Facebook messenger.
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Voice calling via facebook messenger
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Only Android devices user show incoming call like normal call with caller full screen picture. While on iPhone call is denoted by push notification.Voice calls only be made between user who installed Facebook Messenger on their Android phones or on iPhone. Though this is voice call option but users can not ring mobile. Or land line numbers also you can not ring to your Facebook friend who logged in via website.