Your WhatsApp account can only be verified with one number on one phone. If you have a dual SIM phone, please note that you still must choose one number to verify with WhatsApp. There is no option to have a WhatsApp account with two phone numbers. Please don't repeatedly switch between different devices and numbers.
Does your WhatsApp number have to be your phone number?
While you need to use a phone number to sign up for WhatsApp, it doesn't have to be your personal number. You can use an alternative number including a landline, or set up a fake WhatsApp number.
Can we have 2 WhatsApp accounts on one phone?
Dual WhatsApp accounts can be used on a single Android smartphone. WhatsApp can be used with two different accounts on the same phone. The instant messaging app is among the most popular apps in the world. Samsung phone users can head to Settings > Advance features > Dual Messenger.