How can I get a JioCloud app for a feature phone (JioPhone)?

How can I login into my JioCloud account on feature phone (JioPhone)?

How do I upload files into my JioCloud account from my feature Phone (JioPhone)?

How do I access my JioCloud content on another smartphone or desktop which I had backed up from my feature phone?

I have bought a new phone. How do I restore my older JioCloud backed-up contacts to my new device?