Hi friends.i m using airtel service since last 7years after changing my service from bsnl to airtel throgh MNP.
According to my experience the signal quality of aforesaid service provider is best in this category.but I think the talk time and Internet packs are costly than others service providers. Although its packs are costly but I prefer it due to its signal and Internet speed.
Call quality is best and clear without any call disconnection problem.
So the packs are costly but service is best