The integrated railway inquiry number 139 may soon be a thing of the past. On Wednesday, the railways introduced a new mobile number (09415139139) to get information and exact position of six premium trains.
“Being launched on trial basis, if it goes well, the number will be introduced for all passenger trains,” a senior commercial department official of Central Railway told TOI.
http://articles.timesofindia.indiatimes.com/2011-10-21/nagpur/30306084_1_passenger-trains-mobile-number-central-railwayNew enquiry number for premium trains
Indian Railway Turn Around News 
I enjoyed this service from chennai railway dept :-):-) its so helpful:-):)