Indian Railway in collaboration with Google is now providing a 10 digit mobile number.
Just SMS your PNR number on this mobile number and instantaneously you will get your ticket's current status along with all other journey related details.
The number is 97733-00000 . NO need to prefix 0 or +91.
Best of all, you don't pay a premium charge for any of this, just the price of a standard SMS. PLEASE DON'T FORGET TO STORE THE NUMBER IN YOUR MOBILE PHONE.