For someone who travels a lot, I would love to have the ability to have WhatsApp on multiple phones (like telegram). I have a separate phone for traveling to US/Canada, which I usually wipe clean before crossing. It's really cumbersome to backup/restore Whatsapp messages from one phone to another. Or I just lose the messages that I send/receive while traveling.

You can install Whatsapp on up to four or five devices. There one main device, and the rest are "clients", exactly like the desktop apps. But they can send and receive messages even when the main device is offline.

What do you put on the cleaned phone?