Download apk file from here.Whatsapp
Go to android sdk path.
In my case it is D:\android-sdk-windows\platform-tools
Place the downloaded apk file inside D:\android-sdk-windows\platform-tools
Open command prompt Reach the path D:\android-sdk-windows\platform-tools
Type in command promt.
adb install whatsapp.apk
It is done.
Installed the apk
Now register whatsapp on emulator with the real mobile number which U are having,coz it will send an SMS on it.
After a while the verification code is recieved in ur real mobile.
Now start another emulator from eclipse.it will be having emulator port number 5556.
and ur previous emulator would have 5554.
You can check ur emulator port number on top left of emulator.
The second emulator which u have started
. 1.Go in messaging .
2.Type the same message in second emulator which whatsapp has send on ur real mobile device and send it to 5554.
The first emulator will receive the message and ur mobile number will be verified.