How to Access Someone Else's WhatsApp Account 1.Uninstall WhatsApp from your phone or device. You'll install it again at the end of the method, but you'll need to configure it differently, and the easiest way to make sure you'll be able to do that correctly is to completely uninstall it now. 2.Obtain your target's phone. You'll need it for two different steps throughout the process, but this shouldn't take too long - you should be able to return it before your target starts to miss it. 3.Find your target's phone's Media Access Control (MAC) address. A MAC address is a unique identifier assigned to your phone or other device that essentially serves as its online identity. Find and write down your target's MAC address. It takes the form of six pairs of letters or numbers, separated by colons (01:23:45:67:89:ab). On an Android, find this in Settings → About phone → Status → Wi-Fi MAC address. On an iPhone, go to Settings → General → About...