If you want cheaper call rate and full talk time with minimum terrif plan then go for telenor. It is the only mobile oprator which provide full talk by recharge of rs 30.
now lets see about its sms pack iy is the only operator which provide 100 sms per day for 28 day with a recharge of 57rs.
if we compare pack of internet of telenor with other we find that it is cheaper but of no use because its 2 g speed is so slow as compare to other oprator of same 2g.
If we go for 3g data plan we find that telnor also not provide 3g.but if we go to telenor site we see that they are providing 4g but no tower support.
Its network is also not good every where specially if we are in train we cant find its network.Also it provide pooor call clarity, . so cheap but of no use.