When you’re on your phone and want to ask a friend for help, the best way to do it is through WhatsApp. But what if you don’t know their WhatsApp number? Well, there are a few ways to ask someone on WhatsApp without knowing their WhatsApp number. For example, you could try asking them in a message or in an online chat. Another way is to use the “WhatsApp call” feature. This will allow you to call someone on WhatsApp without having their number.