The answer to this question is both yes and no. It depends on how you have set up the app on your phone.
WhatsApp is a popular messaging app that can be used by anyone with an internet connection and a compatible device. It allows users to communicate with each other through text messages, multimedia files such as images, videos, and audio clips, and voice and video calls. The app also allows users to create group chats with multiple participants, where all members can participate in the conversation.
By default, WhatsApp is set up so that only people who are saved in your contacts list can send you messages on the app. This is because WhatsApp uses your contacts list as a way of verifying who can contact you. If someone isn’t in your contacts list, they won’t be able to send you messages on WhatsApp unless you add them as a contact or they have your phone number stored in their device.
However, there are ways to let strangers contact you on WhatsApp if you want them to do so. You can change the settings of the app so that anyone with your phone number can send you messages without having to add them as a contact first. This setting is known as “Allow Everyone” and it can be found in the Privacy section of the settings menu in WhatsApp.
There are also some third-party apps available for Android phones that allow users to receive messages from unknown numbers on WhatsApp without having to add them as contacts first. These apps use special algorithms and filters to detect any incoming message from unknown numbers and then forward it directly to your inbox without any additional setup required from your side.
Conclusion: In conclusion, it is possible for strangers to contact you on WhatsApp but it depends on how you have set up the app on your phone. By default, only people who are saved in your contacts list can send you messages but there are ways to change this setting so that anyone with your phone number can contact you or even use third-party apps to receive messages from unknown numbers without having to add them as contacts first.