Hello friends you all lnow that bsnl is the largest cellular network in India but the network of the bsnl is not good because in rural areas the network of bsnl are very weak we cant connect it ti others.
Except bsnl all other cellular operators for example idea, vodafone, tata docomo they all provide better net packs, talk time and the most important thing network. So I would suggest you that keep a sim of bsnl but also have sim of other operators.