WhatsApp adding MP3 sending and read receipt switch in latest beta build

[Windows Central]

WhatsApp development is back in full swing, and although we have yet to see any VOIP calling, new features are still being advanced. The latest private beta went out last night, bringing the version number up to 2.12.20 versus the public release, which is sitting at 2.11.688.

This version of WhatsApp beta is the first to add some significant new features in some time.

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