What is SMS Based PNR ? "139 – Rail Sampark", is user initiated SMS Based service to enquire about current PNR status and other service like train enquiry,Seat availability and TRain Fare. How I can use it ? - Ticket Status / PNR enquiry SMS "PNR [10 Digit PNR Number]" to 139. Example: PNR 1234567890 How much it cost to me ? Only selected Mobile operators support this service. They are AirTel, Vodafone, Idea, Aircel, Loop(BPL), Tata and MTNL. Don't forget that you can avail this service @Rs.3 per SMS. For more details about other SMS Serice. Click here indianrail.gov.in/sms_Service.html People are using Mobile phone in day to day basis and SMS is the most popular communication method second after voice call. Indian telecom companies has seen SMS traffic to grow from 12.3 billion messages in 2004, to 180 billion in 2010. Also, using SMS to fetch train ticket PNR status enquiry through mobile is location independent and very convenient to use. The use get the PNR status with in a minute after he send the request.