You can move all your WhatsApp messages to a new phone, whether it's an iPhone or Android, as you're first setting it up.

WhatsApp has introduced a new feature that lets you make calls without saving the number in your contacts. If you often need to call someone just once or don’t want to clutter your contact list, this ...

You can change your phone number on WhatsApp whether you're still using the same phone, or you're using a new phone.