How to use two whatsapp accounts on my rooted Samsung galaxy star pro device Can I use two whatsapp accounts on same device?
If how
Note: my device is rooted
Download the Parallel Space app. 
Tap WhatsApp icon and you'll be prompted to sign in to the second WhatsApp
When it gets to verifying your phone number, use the other number you want to use and select call verification after sms verification fails.
Voila, you have one WhatsApp account on your first number and to access the other WhatsApp use the Parallel Space App.