As part of this, communications will also be made end-to-end encrypted by default. This is a key feature of WhatsApp, and it’s only natural that this feature is extended to the two other apps as well.

Asha Sharma, Messenger’s head of consumer product, said that calling and sending texts to your contacts will be seamless, regardless of which platform they’re a contact of. That said, she did not say if there will be an option for those who insist on knowing which platform their contact is registered in. There is also no mention of when this feature will be added. That said, chances are this will be part of an upcoming major update, dubbed Messenger 5. For context, the current Messenger version is Messenger 4, launched last year. (Source: Facebook)

Facebook Confirms Cross Messaging Feature For Messenger  WhatsApp And Instagram - 51