"Your phone number is banned from using WhatsApp. Contact support for help."WhatsApp says that they ban accounts if they believe the account activity is in violation of their Terms of Service, so it's in your best interest to learn more about the appropriate uses of WhatsApp and the activities that could violate them. It's worth noting that the company might not issue a warning before banning your account. If you think your account was banned by mistake, you should contact them and they will look into your case. 72 hours after your account has been banned, your friends will no longer be able to see you in their Favourites list (also known as the Contacts tab on Android).