in WhatsApp can be done as many other things, but not Whatsapp.
Whatsapp + installation, after leaving the developer "Rafalense", under pressure from Facebook when it bought WhatsApp, is in the hands of some developers to continue with it, making new versions. I do not advise installation.
This developer has created in March of this year, "Telegram +", which originally it was in the Google Pay until Google decided elimimarla, even with the consent of the developer's own App Telegram. The reason, I imagine that by WhatsApp pressure, at the time Whatsapp + had achieved a market share very important that had gone WhatsApp, being better App messaging official.
For Telegram + spend as much of the same (you can hide the phone number) is greater than Telegram (open source) and security is everything, virtually no Whatsapp.
A greeting