One of the main drawbacks of WhatsApp was that you could not find out if the service was registered
This feature is especially useful when you need to check an unknown number for an account in WhatsApp. Previously, this number would have to be saved.
How to know if there is a number in Whatsapp
one) Open application Whatsapp on your iPhone.
2) Select tab Chats on the bar at the bottom of the screen.
3) Click on the icon New chat in the upper right corner.
four) Now click new contact at the top of the screen.
five) Enter full phone number with country code.
If this number is already stored in your Contacts, you will see the inscription “Already in the contact list” below it.
If the user is not registered with WhatsApp, the message “Does not use WhatsApp” appears.
Now, before you start a conversation with someone, you can easily check if they are in WhatsApp.
However, using the function too often is not worth it, because WhatsApp refuses to check too many numbers.