If someone has been using your WhatsApp account, you need to lock it down. How to Enable Two-Factor Authentication in WhatsApp

Keep in mind that if any of the situations mentioned above are present, you’ll need to act quickly. If you find that someone else is using your account, it’s time to secure it. Unlike other services, the steps above are the only way to see your WhatsApp login activity. If you find an unknown device, tap it and select Log Out.Review the Last active… list for any unknown devices.View the last session or any open session by tapping the vertical ellipsis (three vertical dots) menu icon. Confirm that no new, unknown friends have appeared on the list. Review your contacts on WhatsApp by opening the app and tapping on the Chat icon in the lower right-hand corner. Look for messages about account changes or access. Search your messages by typing WhatsApp in the search bar at the top on iPhone or using the magnifying glass on Android. Follow the steps in the next section on using two-step verification. If anything changed, or there is information that you do not recognize, you’ll need to secure your account.Review the information and verify that it is accurate and up-to-date.Select your profile at the top of the menu.On mobile, tap on the vertical ellipsis (three vertical dots) in the upper right-hand corner. If the interloper tries to hijack your account, they’ll start changing your contact information. Review this list for any messages you didn’t send or received from people you don’t know. When you open WhatsApp, you’ll first see a list of messages. Regardless of their intentions, we will use this section to educate you on some warning signs that someone is in your account. This scenario would most likely be someone who only wants to eavesdrop on your conversations, but some hackers also want to take over your account. Unfortunately, it can be challenging to spot an interloper if they aren’t interacting with the application. Check if Someone is Using Your WhatsApp Account

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