Originally Posted by
dtsm
Not exactly.....
Whatsapp requires phone number to sign up. If and when you swap to another number, which occurs often when I travel, they give you option [not sure if option or requirement, can't remember???] to switch to new number. If that occurs, then folks that ping your original number have to wait for you to swap back to original sim card AND update back to original number.
There's no reason to switch to your new number when you travel. I keep my whatsapp logged in on my home mobile number even though I use my smartphone exclusively on my Beijing mobile number. As long as your 'home' mobile account is still yours, it doesn't need to tie in with the active data account you might be on.