NEW DELHI: Train passengers can now sleep soundly without worrying about missing their station as the Railways has launched a new service which will ensure that they get a "wake-up call" on their mobile phones half-an-hour before the scheduled arrival at their destination.Similarly, another feature - 'train destination alarm call' - has also been introduced through which passengers will get an alert call 30 minutes before the train reaches their destination station.The service, a joint initiative of the IRCTC and Bharat BPO, is available through voice call on Railways enquiry number 139."The user needs to enter the required data such as PNR number, station name, STD code of station while calling up 139 for getting the wake-up alarm," a senior Railway Ministry official said.Wake-up alarm shall be made to the passenger 30 minutes before the train reaches the the station. Similarly, the train destination alert call shall also be available 30 minutes before train reaches the destination station, he added.According to the official, after getting all the inputs like PNR and station name on 139, the system will check current position of the train before sending the alert call.'139', a crucial train enquiry service, has undergone transformative changes over the years providing round-the -clock services on real-time basis.One can find out the schedule of train arrival or departure, current position of train, fare inquiry through dialling 139. One can also book a meal on certain trains through 139, the official said.139 customer service also provides information related to Tatkal seat availability, cancellation, refund rules and platform position.