After porting form whole lot of network operators I finally fixed idea as tmy permanent network operator.
As it is the best network operator for me.Where ever I have moved for trips or holidays idea is always there in my network tower of my phone.
It is a little expensive as compared to aircel and tata docomo but has the best network everywhere and anywhere.It has 2G and 3G connections availability.Only drawback is it does not hav 4G network yet.Hope to have it soon.