South Central Railway Secunderabad started An Un-Reserved Ticket through Mobile Application (UTS app) from 16 July 2018. This app support Android & Windows mobile phones.
There are two modes of taking mobile journey tickets.
1.Paper Ticket: The passenger can book ticket through the mobile app. On booking of ticket, he/she will get Booking ID along with other ticket details and take print out at the Automatic Ticket Vending Machine (ATVM) using the booking ID
2.Paperless Ticket: The passenger can book paperless ticket through mobile application and ticket will be delivered in the mobile application itself. The passenger can travel without taking hardcopy of the ticket.
You can book tickets 3 hours before train schedule. For detail, please visit website https://www.utsonmobile.indianrail.gov.in