Yes, Jio phone does support Whatsapp and Facebook now, Previously this feature was not available. after the new update, your Jio phone has started supporting these two elements. To install Facebook and Whatsapp follow the below steps:
Reliance JioPhone stands between a featured phone and a smartphone. It has the traditional keypad design but at the same time brings some advanced features like support to VoLTE, advanced OS, and support for JIO apps. But unfortunately it will not support whatsapp or hike messenger, Please check the link for details. reliance jio phone
No, there is no option of Hotspot in the Jio Phone. You can check the below video:
Check more details about this phone here:Jio Phone
Yes, the Reliance Jio Phone has a dedicated memory card slot. You can use an SD card slot up to 128GB.
Specs: Reliance Jio Phone
Yes, Jio Phone supports Video calling through JioVideoCall app. It will also be coming with WhatsApp but video call feature is not known to be supported as of now.
You can also check the complete specs here: Reliance JioPhone