How to hack Whatsapp

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 → Wi-Fi
Address.
On a Windows phone, look in Settings → About → More info
→ MAC address.
On a BlackBerry, go to Options → Device → Device and
Status info → WLAN MAC.

4- Find your MAC address using the instructions
above. Make sure to save it somewhere secure, as
you'll want to change your device back to that
address once you're done.

5- Change ("spoof") your phone's MAC address to that
of your target. This will allow your phone to pass as
your target's, letting you convince WhatsApp that you
are your target when you log in.

#On an iPhone or other device, install a MAC spoofing app
like MacDaddy X or WifiSpoof. Use that to change your MAC
address.

#On Android, install BusyBox and the Terminal Emulator
(apps available for free on Google Play). In the terminal,
type "ip link show" to see a list of interfaces. Identify the one
that has your MAC address -- for this example, 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. To check that you've successfully changed your
MAC address, enter "ip link show eth0."

6- Install and configure WhatsApp on your phone. Enter
your target's phone number to set up WhatsApp
rather than your own. This will allow you to receive
their messages and send messages from their
account.

7- Get the confirmation code from your target's
phone. This code will be sent to their phone number
as part of the WhatsApp configuration process.
Access their phone one last time to get that
verification code. Enter it into WhatsApp on your phone
when prompted, and you're all ready to go.

#If you don't want your target to find out about your
spoofing, make sure to delete the confirmation code from
their phone before they can see it.

8-  When you no longer need to access your target's
WhatsApp account, change your MAC address back
to what it was. Repeat the instructions to change it,
but this time change it to your original address rather
than your target's. This will restore your phone to how it
was originally, which will ensure that there are no future
problems with Internet usage or connectivity.