How to set destination alert or wake up call while travelling in trains
As a part of this, you have to call 139, say the PNR number on your reservation ticket and verify the name of the railway station where you have to alight. This system allows you to receive a call on your cell phone 20 minutes before the destination. This facility is only available from 11 pm to 7 am. However, it is convenient for those who are travelling during the night.