Please use the methods with caution and not for unethical purposes. Monitoring an individual’s conversations without their permission is an invasion of their privacy. Before you attempt to access their WhatsApp account, ask the person for permission. There are multiple ways to get access to someone else’s whatsapp account Method 1:Web WhatsApp Open WhatsApp on a friend's phone. Tap Settings or ⋮. Tap WhatsApp Web/Desktop or WhatsApp Web. Open the WhatsApp Web website on your computer. Point the phone's camera at your computer to scan the QR code. Method 2: MAC Spoofing A Media Access Control address (MAC address) is a 12-character unique identifier assigned to the network adapter of your WiFi device. A MAC address can be used to uniquely identify the smart phone of your friend whom you want to hack the Whatsapp account on the Internet or the local network. If you want to access the whatsapp account of your friend, you need to find the MAC address of their account. Follow the below steps in order to hack your friend’s account. Step 1: Uninstall Whatsapp Account from your device Initially, you must uninstall your Whatsapp account from your device. Don’t worry! Your account can be reinstalled and configured at the end of your Hacking process. Be Careful! Make sure that your Whatsapp account on your mobile device is completely uninstalled successfully. Step 2: Acquire the smart phone of the target (victim) that you wish to Hack Get the mobile phone of the victim that you desire to access. Though it is little bit rugged, try to acquire the mobile phone of the victim. The victim’s mobile phone will be essential at two variant steps throughout the hacking process. Be cautious while using the victim’s phone. Don’t take much time and try to place it back before the victim starts to locate the device. Step 3: Locate the MAC (Media Access Control) Address from the Target’s Phone A MAC address is a 12-character unique identifier assigned to the mobile device which can be served as its online identity. A MAC address varies from one device to other. So, find the platform of the smart phone that is used by the victim. A MAC address consists of six pairs of digits that are separated by colons. For Example, it looks like (01:53:35:47:78: cb). Smartphone Platform: How to find MAC Address? Android : Settings >> About Phone >> Status >> Wi- Fi MAC address iPhone : Settings >> General >> About >> Wi-Fi Address. Windows Phone : Settings >> About >> More info >> MAC Address. BlackBerry : Options >> Device >> Device and Status Info >> WLAN MAC Step 4: Find the MAC address of your own Mobile Phone Get the MAC address of your Mobile device and save and ensure that you store it in a secure manner. Again, you’ll require your MAC address to use your mobile device after completion of your hacking process. Step 5: Alter [Spoof] your MAC address similar to the victim’s MAC address Spoofing the MAC address allows your mobile device look similar as victim’s device. By spoofing there is an advantage of letting you to persuade Whatsapp that you are logging into your own account. But, truly you are trying to log in into the victim’s Whatsapp account. Step 6: Install variant spoofing apps depending on the victim’s mobile device. Device : Spoofing App iPhone (or) other device : MacDaddy X or WifiSpoof. –>Use this app to change your MAC address. Android : BusyBox, Terminal Emulator –>Both these apps are available for free on Google Play. In the terminal, type “ip link show” and you can view a list of interfaces. Identify the one that has your MAC address. Example: Assume we’ll use the eth0 interface. In the terminal emulator, enter “ip link set eth0 address XX:XX:XX:XX:XX:XX” and “ip link set eth0 broadcast XX:XX:XX:XX:XX:XX”, where eth0 is the interface you identified and XX:XX:XX:XX:XX:XX is your target’s MAC address. In order to verify that you’ve changed your MAC address successfully, enter “ip link show eth0.” Step 7: Re-Install and configure whatsapp account on your Device After installing and configuring Whatsapp account on your device, you access the victim’s whatsapp account. Enter the victim’s phone number so as to set up WhatsApp rather than your own. This allows you to receive and send messages from the victim’s account. Step 8: Attain Confirmation Code from the victim’s mobile phone During the WhatsApp configuration process, confirmation code will be sent to the victim’s phone number. Access the victim’s phone for the last time to acquire that verification code. Enter it into WhatsApp that is on your phone. Finally, you have successfully hacked the Whatsapp account of your target. If you don’t wish the victim to detect about your spoofing, make sure to delete the confirmation code from their device. Step 9: Change your MAC address as earlier after successfully accessing the victim’s mobile. Similarly, repeat the instructions to change the MAC address, but you need to change it to your original address rather than the victim’s MAC address. Now, your mobile will be restored to its original position and ensures that there are no future problems with Internet usage or connectivity issues. Method 3: Spy Software The easiest way of spying WhatsApp messages is to use a spy software program. In the current marketing trend, there are bounteous companies that are promoting WhatsApp spy programs. In spite of many companies, we must choose genuine spy apps that are trustworthy. One of the best software to spy on WhatsApp is mySpy which is well-known for its quality and it is one of the top-notch features. You will have to download and install the mySpy app onto the victim’s phone on which you want to access and monitor the WhatsApp messages. Make sure that you can keep the victim’s phone with you for few minutes. 1. Get permission to monitor victim’s phone The spy apps that you use are very much essential and intended for the employees, parents, government officials in order to access or monitor the activities of subordinates, children and other . Before proceeding, make sure that the victim gives permission to access and monitor their mobile. 2. Select apt SPY program or app Various spy apps or programs are offered by various app providers. Study and analyse in order to find a best spy program that best suits your mobile device. You need to consider the following factors to select a genuine app. Purpose of the app Efficiency of the app Whether it hides spy activity undetected from the victim mySpy and Spymaster Pro are very good apps or programs that can be used to access other’s whatsapp account. Step 3: Purchase and install best spy program Buy a genuine app and install the app by following the on-screen instructions. This app must be installed on your phone as well as the victim’s phone. Step 4: Configure the app and initiate tracking Follow the instructions so as to install the app and make sure that you complete all the settings properly so as to start the hacking process. Now, you can receive all the conversation on the victim’s account. Successfully, you’ve accessed the whatsapp account of your friend or beloved ones. P.S: As the question asked seems to be repetitive and have many answers. I have used the best two answers and reference here. I do not claim to write the answer here.