Normally, once you make a voice call on WhatsApp and it goes unanswered or the call is declined, you will now see a new "Call declined" screen with three new round buttons. One is to "cancel and go back to the conversation:, the other is to "place another call", while the last one is to "record a voice message". This makes everything similar to leaving a voicemail on regular phone calls.
Normally, after a call was declined or unanswered, you be thrown back into the chat where you could easily call back or record a voice message and send to your contact. But with this new options, with just a tad, you got a better and easier WhatsApp.
Also Checkout: HOW to send PDF on WhatsApp
The other new feature in WhatsApp is a new Fixedsys font, which can be used to differentiate a quote or a piece of code ( this feature will be good for developers, as they also make use of WhatsApp)
Oh... it's just me) for example. To trigger this feature, you have to start and end your sentence(s) with ``` and no spaces between it and the first or last characters, like so: ```this is awesome```.
There's one last "feature" which you might already be seeing on WhatsApp a few versions ago: a "waiting for this message" uhm... this appears when you're talking to someone.
This seems to show up when WhatsApp knows it should deliver a text message to you, but it hasn't grabbed all of the details yet. I've only seen this hot feature once and even then, it just appeared there for less than a second.