Now at this moment, before Duraga Puja in Kolkata Reliance GSM trying to establish their network. So they have made their network better than before. But Reliance GSM's main problem is their cheap rates as
1.RGSM to RGSM 25 paisa in day time, 11-6 at night 5 paisa
2.Other network 50 paisa.
So for that reason people always become busy in phone, make network busy specially during 11-6 night.Now a peculiar problem arouses in their network, after 11 at night no sound in calling just fails to connect, not saying even network busy, after 12 times they will say you network busy.
Their Customer Care are helpless they always tell you "Sir we are working on network".But I am using their service around 3 month, no change at least I got from them. If you are planning to have their network, please keep another phone with good connection, otherwise you will face big problem.
Another problem of them, they will fail to give you Cell info at the suburbans of Kolkata. Whenever you are in Kolkata you are getting cell info like Jadavpur, Park Circus in the same phone. But no cell info in the Suburban like Barasat, Dumdum for a month.