bhai koi bta do ki Railway Seat or Class Upgrade kaise karta hai ya kab hota hai kis condition pe automatically upgrade karta hai without any payment.
1) agar mera me ho sleeper se 3AC upgrade.
2) agar mera me ho 3AC se 2AC upgrade.
3) agar mera me ho 2AC se 1AC upgrade.
please...
more... answer my question please I don't know how it done.