I tried send "USE" to 144 but never worked. Called Vodafone Customer Care. They said to send an sms to 144 typing "SURF VMC". Did it and is working perfectly. Displaying the amount of data that has been used till now.
Thank You uberjon and Samm for your help. Thnx guyz.
No problem.
I just tried "SURF VMC" but I received a message saying that I entered a wrong keyword. So, it's either *131*98# or "SURF VMC".
I did not know that. Well, you learn something new every day.