I currently have a Nokia Lumia, with Windows Phone 8.1 installed, and an Asus Zenfone 5, with Android 5.1 Lollipop. Both of them are old and outdated, but the Lumia is horribly so. In fact, I almost exclusively use the Zenfone, and I've kept the Lumia because of one thing only: I do not want to lose my Whatsapp chats and contacts.
Now, though, after the launching of Whatsapp Web, it seems to me that these things are actually backed up on the Whatsapp cloud, and that it would be safe to toss the Lumia and install Whatsapp on the Zenfone. Actually, to be honest, I'm thinking of getting a new phone entirely, and leaving both of these obsolete devices.
My question is, should I get a new phone and install Whatsapp on that device, when I desperately want to keep all my chats and contacts that I have on my Lumia?
Thanks in advance for any advice!