You can use WhatsApp for Send messages, but you may not know what your WhatsApp phone number is. If so, it’s easy to check your number on Android and iPhone. That’s how.
Find your WhatsApp number on Android and iPhone
Start by opening the WhatsApp application on your iPhone or Android phone. In WhatsApp, open the “Settings” page. If you’re on an iPhone, tap “Settings” on the bottom bar of the app. If you are on Android, tap on the three dots and select “Settings” in the upper right corner of the app.
On the ‘Settings’ page, at the top, tap your name. This will open your profile page.
On the “Profile” page, in the “Phone” section, you will see the number associated with your WhatsApp account. This is the number WhatsApp uses for your particular account.
If you want to change the phone number WhatsApp uses, tap your number and follow the onscreen instructions.
And this is how you know what phone number you have been using with WhatsApp on your smartphone. Happy chat!