IRCTC Booking through phone
In order to book your ticket via mobile phone, you need to register your mobile number with the IRCTC, as well as with your bank. Next, the bank will provide you with a Mobile Money Identifier (MMID) and a one-time password (OTP) for payment authorisation.
Now, you need to type in the train number, destination, journey date, class and personal details (name, age and gender), and send the SMS to the dedicated number. Post that, you will receive a transaction ID and you need to make the required payment by sending another SMS. In the second SMS, type ‘PAY’, followed by the transaction ID, MMID and password. A user will be charged Rs 3 per SMS and will also have to pay for the payment gateway – Rs 5 for an amount up to Rs 5,000 and Rs 10 for more than Rs 5,000.
For more details visit https://irctc.co.in
https://irctc.co.in/BankHelpFile/imps/imps_help.htm
https://irctc.co.in/beta_htmls/index.htm