Hello friends.airtel sim is the best option to choice amoungs all mobile operator.even at every place its network is available.even its 2g is that good.it has the best monthly option to choice from.and its special schemes is also the best.its costumer service is quite okay I haven’t experience much.its calling charges are quite less compared to other services.its network is available in the villages where other operator networks are not reachable.i love it so much that I can’t replace the sim.best ever network.??